6.1 Life-Cycle Assessment and Eco-Labels

Every environmental claim a brand makes rests on a calculation someone performed, and life-cycle assessment is the method by which that calculation becomes defensible rather than rhetorical. Its discipline lies in the boundaries: what is counted, over which life stages, against which functional unit, and with which allocation rules. Two studies of the same garment can differ by a factor of several and both be correct under ISO 14040 and 14044, because they answered different questions. This is why a number without its method is not evidence.

This section takes the reporting angle rather than the laboratory one. It covers the software ecosystem that produces LCA results, the corporate layer that consumes them under the CSRD and its revised scope, and the chain that runs from a full study to a partial footprint to a label on a garment. That chain is where credibility is most often lost, since each step compresses the result further, and a label answers only the question it was designed to answer.

6.1.1 Measuring Impact by the Book: LCA under ISO 14040/14044

CROSS-MODULE REFERENCE : the four ISO 14040/14044 phases (goal and scope, functional unit, inventory analysis, impact assessment, interpretation) and the hands-on openLCA lab are taught in the Sustainable Materials and Processes module, Chapter 6.3, and are not duplicated here, this chapter keeps the reporting and tool-selection angle.

Above the product-level LCA sits company-level reporting: the EU Corporate Sustainability Reporting Directive (CSRD), with the European Sustainability Reporting Standards (ESRS), requires large companies to report audited environmental and social data, with product LCAs, energy monitoring (ISO 50001), and EMS data (ISO 14001) as the operational feedstock.

Reporting scope update (2025–2026). The EU "Omnibus I" simplification package, finalized in December 2025, narrowed CSRD scope to companies with more than 1,000 employees and over €450 million turnover; companies that reported for FY2024 but fall out of scope receive a transition exemption for FY2025–26. EFRAG delivered a simplified ESRS in December 2025, cutting mandatory data points, and the planned sector-specific standards for textiles will be voluntary. For most TCLF SMEs, the practical consequence is indirect reporting: they fall outside CSRD but must supply data, footprints, certificates, traceability records, to the large customers who remain in scope (European Commission, 2025; Deloitte, 2026; White & Case, 2025; EU Textiles Ecosystem Platform, 2026).

6.1.2 From LCA to Label: Turning Impact Data into Credible Claims

Between a full LCA study and a consumer-facing claim sit several intermediate formats. Partial footprints quantify a single impact type: the Carbon Footprint (CFP, kg CO₂e per functional unit), the Water Footprint (WFP, ISO 14046, distinguishing blue, green and grey water) and the Chemical Footprint (CHFP). They are cheaper to produce and easier to communicate than a full LCA, but they invite burden-shifting: a cotton T-shirt (CFP ≈ 2.5 kg CO₂e; WFP ≈ 2,600 L) and a polyester T-shirt (CFP ≈ 5.5 kg CO₂e; WFP ≈ 500 L) rank oppositely on the two indicators, a single-number comparison is meaningless without stating which impact matters where. Environmental labels are classified by ISO into three types. Type I (ISO 14024): third-party-verified labels against predefined criteria, EU Ecolabel[51], GOTS[52]. Type II (ISO 14021): self-declared claims by the manufacturer ("recyclable", "biodegradable") with no independent verification, the natural habitat of greenwashing. Type III (ISO 14025): Environmental Product Declarations (EPDs), quantified, LCA-based, independently verified datasets intended for product comparison rather than marketing. The informational value of labels varies enormously: GOTS covers environmental and social criteria across the lifecycle; OCS certifies only organic fiber content; OEKO-TEX® Standard 100[53] certifies only consumer safety; BCI expresses support for an initiative rather than product properties. A label answers only the question it was designed to answer. The EU's response to this fragmentation is the Product Environmental Footprint (PEF): a standardized, multi-category LCA methodology intended to make environmental claims comparable and to underpin future regulation of green claims.

In May 2025, the European Commission approved the Product Environmental Footprint Category Rules (PEFCR) for Apparel and Footwear, version 3.1, the first standardized EU method for measuring the lifecycle environmental impact of clothing and shoes. It covers 13 product categories (T-shirts, dresses, boots, swimwear and others) with tailored rules, integrates recycled content, durability and repairability parameters, and is voluntary but recommended as the basis for substantiating environmental claims; methodology updates are planned for 2026 and a new supporting database for 2027–2028 (European Commission, 2025; SGS, 2025; UKFT, 2025).

6.1.3 Case example: Asket, the Impact Receipt

Asket[50], the Swedish menswear brand, turns life-cycle assessment into a consumer-facing label. For every garment it publishes an "Impact Receipt" that reports the product's climate, water and energy footprint and breaks it down across the life-cycle stages, raw material, spinning, fabric production, confection, trims and transport, instead of collapsing it into a single opaque figure. The numbers come from a full cradle-to-grave LCA that Asket built over roughly two years with RI.SE[54] (the Research Institutes of Sweden) and, more recently, the impact-data platform Vaayu, giving the disclosure the methodological backing that separates a credible claim from a marketing one. Paired with the brand's "no discounts, buy less" positioning, the receipt turns the abstract map of the value chain into a per-product data statement, the same logic that the EU Product Environmental Footprint and the Digital Product Passport are moving from voluntary gesture to requirement, and a clear European counterpart to per-product footprint labels elsewhere (Asket, asket.com; RISE; Vaayu).

Figure 6.1, Asket's 'Impact Receipt': the per-product climate, water and energy footprint published for every garment. (Source: asket.com)

6.1.4 The Digital Sustainability Reporting Stack

Sustainability reporting is now a software category. Footprint platforms such as Carbonfact and Vaayu compute product-level carbon, water, and energy data across whole ranges, using AI-assisted data mapping and large emission-factor libraries instead of a bespoke LCA per SKU. Higg tools (Cascale) remain the shared material-benchmarking layer, accessed through Worldly; NEMO-style data services and PEF/EPD providers supply the verified datasets that feed corporate disclosures, Eco-Scores and Digital Product Passports. For an SME, the practical question is not which tool is “best” but which one integrates with data the company already holds, bills of materials, purchase orders, supplier certificates, and speaks the reporting language its customers require (PEF, EPD, CSRD/ESRS).

6.1.5 AI-Assisted Footprint Estimation

AI-assisted tools estimate a product’s footprint from inputs such as fiber mix, weight, country of manufacture and logistics route, without running a full ISO 14040/44 study. That is good enough for range-level prioritization, hotspot screening and early design choices, where speed and coverage beat precision. It is not enough when the number will be verified, compared or disclosed: PEF and EPD claims still require a compliant LCA. Use AI estimates to decide where to invest, then commission the full study where the claim matters, the method itself is taught in the Sustainable Materials and Processes module (Ch6.3).

6.1.6 Impact Dashboards and Data Storytelling

Footprint data earns its value in the dashboard. KPI dashboards for sustainability teams track carbon, water, waste and circularity over time and across ranges, turning LCA results into management decisions. The credibility rule for any externally published number: state the method, the scope and the data vintage. How to frame sustainability figures for consumers and stakeholders without greenwashing is taught in the Sustainability Communication and Marketing module, Chapter 1.

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