The European Sustainability Reporting Standards (ESRS) require fashion and textile companies to disclose two figures that the industry has not previously been required to compute: the Permanent Residual Liability (PRL) — the physical mass of products placed on market that will not be recovered at end of life, expressed in metric tonnes (tonnes) under ESRS E5-5 — and the associated Scope 3 Category 12 greenhouse gas emissions under ESRS E1-6. These two obligations are methodologically distinct, unit-incompatible, and must be disclosed in separate columns. A third obligation — the disclosure of compensatory investments in nature-based solutions under ESRS E5-2 — requires a verifiable reference standard that does not currently exist in the textile sector.
This paper describes a general framework for computing all three figures from a common input dataset: a brand's annual fibre mix placed on market. It proposes a fibre-type classification approach, a mass-balance methodology for PRL computation, a pathway-based emission model for Cat.12, and a five-criterion eligibility standard for compensatory investment verification. The framework is designed to be auditor-defensible, ESRS-aligned, and applicable to the full range of textile fibre types found in fashion supply chains.
The Corporate Sustainability Reporting Directive (CSRD, Directive 2022/2464/EU) and its implementing standards — Commission Delegated Regulation (EU) 2023/2772 of 31 July 2023 — create three distinct new obligations for fashion and textile undertakings:
ESRS E5-5 (Resource Outflows) requires disclosure of the mass of products placed on market that are not designed for circularity or are not effectively recovered at end of life. For textile companies, this is a function of the fibre types they use, the end-of-life infrastructure available in their markets, and the effectiveness of textile recycling for different material categories. The disclosure unit is metric tonnes (tonnes) of physical mass — not a financial figure, not an emissions figure.
ESRS E1-6 (Scope 3 Category 12) requires disclosure of greenhouse gas emissions from the end-of-life treatment of sold products. For textiles, this is primarily methane from the anaerobic decomposition of natural fibres in landfill, and CO₂ from the incineration of synthetic fibres. The disclosure unit is tonnes of CO₂ equivalent (tCO₂e), using IPCC AR6 GWP100 parameters.
ESRS E5-2 (Compensatory Investment) requires, where a company directs capital to nature-based solutions or regenerative projects as partial compensation for its circular economy liabilities, disclosure of that investment with sufficient specificity to allow independent verification. No standard reference format for this disclosure currently exists in the textile sector.
Scope of application — Omnibus revision (2025): The European Commission's 2025 Omnibus simplification package revised CSRD reporting thresholds, raising the headcount and turnover criteria applied to large undertakings. As a result, the universe of companies required to file under the full ESRS framework was reduced from approximately 50,000 to approximately 5,000 undertakings for the initial reporting wave. The obligations described in this paper apply to all undertakings within this revised scope. SME-standard ESRS, currently in development, will extend proportionate disclosure requirements to a broader population in subsequent reporting years.
SBTi alignment (June 2026): The Science Based Targets initiative Corporate Net-Zero Standard Version 2.0, released June 2026, requires consumer-facing companies with Scope 3 emissions exceeding 5% of their total GHG inventory — which encompasses virtually all textile brands — to set science-based targets for Scope 3 Category 12 end-of-life emissions. This requirement is additive to ESRS E1-6 and uses the same Category 12 emission base. Brands computing their Cat.12 figure under RVS-STD-001:2026 obtain a value directly usable as the SBTi V2.0 target baseline, eliminating the need for a second computation engagement.
The critical insight underlying this framework is that these three obligations share a common input: the brand's annual fibre mix placed on market. A methodology that computes all three from the same dataset enables consistent, internally coherent CSRD disclosures that an auditor can trace from input to output without cross-referencing multiple methodologies.
The Permanent Residual Liability (PRL) is the mass of textile material placed on market in a reporting year that does not re-enter the supply chain — as recycled fibre, recycled yarn, or reused garment — at end of life. It is "permanent" in the sense that once a material reaches a terminal waste fate (landfill, incineration, open burning, or downcycling to non-textile applications), the material value is lost permanently from the textile economy.
The PRL is a balance-sheet-style liability: the undertaking places products on market (a commercial act); at end of life, some fraction is recovered (circular); the remainder is a liability — a permanent material outflow that the undertaking has introduced into the world and cannot reclaim. ESRS E5-5 requires this liability to be quantified and disclosed in metric tonnes.
PRL is computed using a mass balance framework with two key variables:
Net effective collection rate (CR): the fraction of post-consumer textile mass placed on market that is verifiably re-entering circular pathways — as recycled fibre, recycled yarn, or reused garment — at end of life. This figure is derived from gross national collection statistics (ADEME in France, WRAP in the UK, US EPA in the United States, Eurostat for EU aggregate) and adjusted downward to reflect sorting contamination losses: the fraction of collected material that re-enters landfill or incineration through improperly sorted streams before reaching a textile-to-textile or reuse pathway. Net effective rates applied in this framework: Germany 42%, France 38%, United Kingdom 33%, United States 15%. These are the jurisdiction defaults used in RVS-STD-001:2026 and the CircleUNA Compute engine. Licensees may substitute audited brand-specific CR values where available.
Effective recovery rate (ER): the fraction of collected material that is successfully returned to the textile supply chain as recycled fibre, recycled yarn, or reused garment. This variable is fibre-type specific and reflects the maturity of recycling infrastructure for each material category. Current infrastructure is most developed for cotton (mechanical recycling of mono-component garments) and wool (established mechanical recycling sector, particularly in Prato, Italy). Polyester-cotton blends have very low effective recovery rates because fibre separation technology is not yet at commercial scale.
The residual fraction — the fraction of a given fibre mass that becomes PRL — is the complement of the product of these two variables: RF = 1 − (CR × ER). PRL for a given brand is the sum of the residual fractions across all fibre types and all markets, expressed in metric tonnes.
A robust PRL computation requires a classification system that distinguishes textile fibres at a granularity sufficient to assign meaningful collection rates and recovery efficiencies. A workable system covers at minimum:
The framework proposed here recognises thirty-eight distinct fibre types. Fewer categories risk material misrepresentation for brands with complex fibre mixes; more categories would require granularity of supplier data that most brands cannot currently provide.
Scope 3 Category 12 emissions are the greenhouse gas consequences of the terminal waste fates that constitute the PRL. They are derived from the PRL computation and share the same input data. The key distinction is that PRL measures mass (metric tonnes) while Cat.12 measures climate impact (tCO₂e). The two figures are governed by different ESRS standards (E5 and E1 respectively) and must be disclosed separately.
Natural fibres — cotton, wool, linen, and their variants — contain degradable organic carbon (DOC). When these fibres reach anaerobic landfill conditions, they decompose over time, releasing methane (CH₄). Under IPCC AR6 (2021), biogenic methane carries a GWP100 of 27.9, making landfill decomposition of natural fibres a climate-relevant emission pathway even though the carbon is biogenic in origin.
The computation uses an adapted first-order decay model, consistent with IPCC 2006 Guidelines (Volume 5, Waste), parameterised with fibre-specific DOC values, landfill gas recovery rates by jurisdiction, and CH₄ oxidation factors. Each fibre type has a distinct DOC value reflecting its biochemical composition: protein-based fibres (wool, cashmere, silk) have different decay characteristics from cellulosic fibres (cotton, linen, viscose).
The GHG Protocol and ESRS E1-6 guidance both specify that biogenic CO₂ from incineration of natural fibres is excluded from Scope 3 Category 12. However, biogenic CH₄ from landfill decomposition is included — this asymmetry is intentional and reflects the relative climate forcing of the two gases under the GWP100 framework.
Synthetic fibres — polyester, nylon, acrylic, elastane — have zero degradable organic carbon. Their landfill contribution to Cat.12 is effectively zero: no methane is released, because there is no organic carbon to decompose anaerobically. This does not mean that synthetic landfill is environmentally neutral. Synthetic fibres that enter landfill persist in the terrestrial or aquatic biosphere for 200 to 1,000+ years without any degradation pathway. This persistence is the Permanent Residual Liability disclosed under ESRS E5-5 — a separate and equally serious form of irreversible environmental harm, measured in metric tonnes of physical mass rather than tCO₂e. The absence of a Cat.12 GHG emission from synthetic landfill reflects the ESRS unit separation, not an absence of harm.
When incinerated — the dominant end-of-life pathway in markets with high incineration rates such as Japan, Germany, and the Netherlands — synthetic fibres release fossil CO₂. The emission factor is derived from the fibre's carbon content and fossil carbon fraction, using the standard combustion chemistry conversion. The model applies the GHG Protocol's no-credit rule for energy recovery: emissions from incineration with energy recovery are counted in full in Cat.12, without a deduction for the energy value recovered. This is consistent with ESRS E1-6 guidance.
Certified industrial composting represents a near-zero Cat.12 pathway for protein-based natural fibres, particularly wool. Under aerobic composting conditions, wool decomposes without producing methane — the primary source of Cat.12 emissions in the landfill pathway. The resulting CO₂ is biogenic and excluded from Cat.12 under ESRS E1-6, consistent with the GHG Protocol treatment of biogenic carbon.
For wool specifically, certified industrial composting is a credible and methodologically superior end-of-life alternative to incineration. The Cat.12 emission factor for certified composting is near-zero, compared to the DOC-based landfill methane factor applied in the anaerobic pathway. For this pathway to be credited in the PRL and Cat.12 computation, the following conditions must be met:
Where these conditions are met, the composted mass is excluded from the Cat.12 landfill emission calculation and reclassified as a near-zero-emission fate. This pathway is particularly relevant to brands with significant wool, cashmere, or other protein fibre content, and represents a genuine Cat.12 mitigation strategy that does not require modification of fibre composition.
In markets where informal textile waste management is prevalent (parts of Asia, Africa, and South America), a fraction of post-consumer textiles reach open burning. This pathway carries elevated emission factors for both CO₂ and CH₄, and is applied to Rest-of-World market fractions using conservative default estimates from national GHG inventory data.
Beyond the GHG emission pathways described in sections 3.2–3.5, synthetic textiles introduce two categorically distinct forms of invisible contamination at end of life that the Cat.12 metric does not capture. These are measured separately from both PRL and Cat.12 and are not currently within scope of ESRS E5-5 or E1-6 disclosure, but they constitute a material environmental liability that any complete end-of-life framework must acknowledge.
Persistent synthetic polymer contamination. Synthetic fibres — polyester, nylon, acrylic — do not biodegrade. As they fragment at end of life, they produce microparticles that persist in soil and aquatic systems for 200 to 500 years. These particles have been detected in rainwater, Arctic ice, deep-ocean sediment, human blood, and placental tissue. The Permanent Residual Liability computed under this framework captures the mass of synthetic material entering this contamination pathway. The Cat.12 metric, expressed in tCO₂e, does not — the two metrics are measuring different physical phenomena in different units.
Per- and polyfluoroalkyl substances (PFAS). PFAS are a family of more than 12,000 manufactured chemical compounds used extensively in textile finishing — water-resistant coatings (durable water repellency, DWR), stain-resistant finishes, and performance membrane laminates. They do not biodegrade. PFAS dissolve into water systems and soil at end of life, accumulate in living tissue (bioaccumulation), and have been detected in human blood on every continent, including in communities with zero industrial exposure. The European Food Safety Authority (EFSA) has established a tolerable weekly intake of 4.4 nanograms per kilogram of bodyweight for the sum of four priority PFAS compounds. Regulatory action is progressing: EU REACH restriction on PFAS in textiles is underway, and multiple US states have enacted bans. Certified PFAS-free DWR alternatives exist for most performance textile applications.
PFAS contamination and persistent synthetic polymer contamination are distinct phenomena and must not be conflated. Microplastics are physical particles (fragmented solid fibre). PFAS are chemical compounds (they dissolve into water systems and bond with proteins). The only path to reducing both is progressive substitution of fossil synthetic fibres and PFAS-based finishes with certified biodegradable alternatives in future production. This framework measures where each portfolio stands today and tracks its trajectory across reporting cycles.
Recent scientific research has identified fungal species capable of enzymatically breaking down synthetic polymer fibres — a pathway that, if validated at industrial scale, would constitute a third route to reducing both PRL and persistent synthetic polymer contamination beyond the two operative pathways defined in Section 5.
Multiple studies published between 2021 and 2025 have documented fungal degradation of polyurethane, polyester (PET), and nylon under controlled laboratory conditions. Notable findings include the enzymatic depolymerisation of PET by fungal cutinase variants at ambient temperatures, and the systematic degradation of polyurethane films by Pestalotiopsis-family species. The mechanisms are distinct from bacterial plastic degradation: certain fungi produce extracellular oxidative enzymes (laccases, peroxidases) that attack the polymer backbone under conditions approximating natural soil environments.
This pathway is not yet operative at industrial scale and does not currently qualify as a documentable end-of-life route under RVS-STD-001. Certification criteria for fungal biodegradation, should this technology reach commercial viability, would require: documented degradation yields (mass loss under standardised ISO conditions), verified aerobic conditions, and confirmation of the absence of toxic degradation intermediates. The methodology is designed to accommodate this pathway by addendum when evidentiary standards are met. Its inclusion here reflects the direction of scientific research and is offered as a forward-looking methodological note, not as a currently certified pathway.
A central design principle of this framework is the clean separation of three ESRS obligations that are sometimes conflated in practitioner guidance:
| ESRS Obligation | Unit | What It Measures | Reduced By CVI? |
|---|---|---|---|
| E5-5 — PRL | Metric tonnes (t) | Physical mass placed on market not recovered at end of life. A material accountability statement — not carbon, not financial. | No |
| E1-6 — Cat.12 | Tonnes CO₂e (tCO₂e) | GHG emissions from the end-of-life treatment of the PRL mass. IPCC AR6 GWP100. Separate line within Scope 3 breakdown. | No |
| E5-2 — CVI | tCO₂e removed + project reference | Capital directed to regenerative projects. Disclosed in a separate column — additional, not offsetting. | N/A — separate column |
These three disclosures use different units, appear in different ESRS standards, and must be presented in separate columns of the CSRD disclosure. Their separation is not a technicality — it reflects genuinely different dimensions of a brand's relationship to material waste. ESRS prohibits netting of waste liabilities against climate investments in the same disclosure columns.
The PRL cannot be reduced, neutralised, or compensated through carbon credit instruments, voluntary offset schemes, carbon neutrality mechanisms, or any other market-based environmental compensation tool. Carbon credits address CO₂e gas flows in the atmosphere. The PRL addresses the persistence of physical solid matter in the terrestrial or aquatic biosphere. These are fundamentally different physical phenomena, governed by different ESRS standards and measured in incompatible units. This non-compensability must be stated explicitly in any regulatory filing citing RVS-STD-001.
PRL may be reduced through two pathways, both operative under RVS-STD-001:
The most direct reduction route is available to all brands immediately: reducing the proportion of high-residual fibres (synthetics and non-certifiable blends) in future production and increasing the proportion of fibres with low residual fractions (natural, biodegradable, and certified circular fibres). This pathway requires no infrastructure dependency and is operative for any brand that controls its material sourcing decisions. The effect is visible in the PRL computation in the first reporting year following the composition change, because the mass basis is the products placed on market in the current reporting period.
For brands that can document a verified closed-loop recycling chain, a portion of the otherwise-residual synthetic mass may be reclassified as recovered. This requires documentary evidence across three points in the chain:
A brand meeting all three documentation requirements and achieving a minimum Certified Closed-loop Rate (CCR) of 50% may apply for a reclassification credit under RVS-STD-001. Chemical recycling producing virgin-quality output is classified as 'recycling' under EU Taxonomy Regulation (EU) 2023/2486, confirming its eligibility as a genuine PRL reduction mechanism.
The 50% CCR threshold is demanding. Few consumer apparel brands currently have the documented infrastructure to meet it. The methodology is ready for those that do; brands that cannot document the full chain remain subject to the full residual fraction for synthetic fibres.
For a nature-based investment to be ESRS E5-2 disclosable with auditor defensibility, the disclosure needs a verifiable reference. In the absence of a sector standard, we propose five criteria that a qualifying investment should satisfy:
Data availability: The primary constraint on PRL computation quality is the availability of brand-specific fibre mix data. Brands that manage their supply chains through product information management (PIM) systems can typically produce fibre mix data by product category. Brands without this infrastructure must rely on sector-average fibre mix assumptions, which should be disclosed as a data quality limitation.
Market geography: Collection rates vary significantly by market. Brands with concentrated European distribution have access to relatively mature textile collection infrastructure. Brands with significant US, Chinese, or developing-market exposure face materially lower collection rates and higher residual fractions. Market-weighted computation is essential for brands with geographically diverse distribution.
Fibre blend complexity: The majority of fashion products contain blended fibres. A robust methodology must handle blends at the component level, applying fibre-specific parameters to each component proportionally. Blends containing elastane above threshold concentrations require special treatment because elastane has zero recycling recovery rate under current infrastructure.
Auditor engagement: The methodology must be designed for third-party assurance from the outset, not adapted after the fact. This means providing auditors with a clear, traceable chain from input data to disclosed figure, with explicit identification of every default assumption and its source.
ESRS E5-5 and ESRS E1-6 create a genuine computational challenge for fashion brands. The PRL figure requires a fibre-level mass balance that most brands have not previously built. The Cat.12 figure requires applying emission factors that vary by fibre type and by end-of-life pathway in a way not covered by existing Scope 3 guidance at sufficient granularity. The ESRS E5-2 compensatory investment disclosure requires a reference format that enables independent auditor verification.
The framework described here addresses all three from a common input, maintains the unit separation required by ESRS, and provides a five-criterion eligibility standard for investment verification that is both practically testable and auditor-defensible.
The specific parameter values — emission factors, degradable organic carbon fractions, effective recovery rates by fibre type, and jurisdiction collection rate defaults — are proprietary inputs to the licensed implementation of this framework (RVS-STD-001:2026, CircleUNA LLC). The conceptual framework described in this paper is placed in the public domain as prior art to support adoption, independent implementation, and regulatory alignment.
1. European Commission. (2023). Commission Delegated Regulation (EU) 2023/2772 of 31 July 2023 supplementing Directive 2013/34/EU as regards sustainability reporting standards. Official Journal of the European Union.
2. European Parliament and Council. (2022). Directive 2022/2464/EU on corporate sustainability reporting (CSRD). Official Journal of the European Union.
3. GHG Protocol. (2011). Corporate Value Chain (Scope 3) Accounting and Reporting Standard. World Resources Institute and World Business Council for Sustainable Development.
4. IPCC. (2021). Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report. Cambridge University Press. [GWP100 values, Table 7.SM.7]
5. IPCC. (2006). 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Volume 5: Waste. Institute for Global Environmental Strategies, Japan. [First-Order Decay model, Chapter 3]
6. ISO. (2018). ISO 14064-1:2018: Greenhouse gases — Specification with guidance at the organization level for quantification and reporting of greenhouse gas emissions and removals. International Organization for Standardization.
7. Science Based Targets initiative. (2026). Corporate Net-Zero Standard Version 2.0. SBTi, June 2026.
8. Textile Exchange. (2023). Preferred Fiber and Materials Market Report 2023. Textile Exchange.
9. WRAP. (2023). Textiles market situation report. Waste and Resources Action Programme, UK.
10. ADEME. (2024). Bilan de la collecte des textiles usagés en France. Agence de la transition écologique.
11. US EPA. (2023). Advancing Sustainable Materials Management: Facts and Figures Report. United States Environmental Protection Agency.
Document integrity record — RFC 3161 Trusted Timestamp (ISO 18014-3)
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|---|---|---|---|
| RVS-WP-001 v1 (initial) | Jul 21 2026 14:39 GMT | 0x0668902B | 300ee9ebb4895191af6a126e4863910a2414724b6db9ed70274331b84325dbf0 |
| RVS-WP-001 v2 (composting + PFAS + fungal pathway) | Jul 21 2026 15:48 GMT | 0x0668A858 | 7ea90ba59a177806f5de9dafb8b4c5ead03c2cdd4bbf7e86f06ac6837092f675 |
TSA: FreeTSA.org · Algorithm: SHA-256 · Token files: RVS-WP-001_v3.tsr · Author: Madina Sinclair · Entity: CircleUNA LLC