The textile sector is the first prioritised product category under the EU's Ecodesign for Sustainable Products Regulation (ESPR, Regulation (EU) 2024/1781). The European Commission's working plan, adopted in April 2025, confirms that textile delegated acts will be drafted through 2026 and adopted by 2027, triggering an 18-month transition that ends in mid-2028 — at which point any garment, footwear, or home-textile article placed on the EU market must carry a machine-readable Digital Product Passport (DPP). This is not a marketing initiative. It is a market-access requirement enforced through customs, market surveillance authorities, and the future ESPR Article 26 destruction-disclosure regime that already obliges large companies to report unsold textile destruction since July 2026. For B2B procurement teams, sustainability officers, and supply-chain directors at apparel brands, fabric mills, and trim suppliers, the operational question has shifted from whether to comply to how deep the data chain must reach. ESPR's textile scope is unusually demanding because the regulation explicitly references Tier 1 cut-and-sew operations, Tier 2 fabric mills (weaving, knitting, dyeing, finishing), and Tier 3 raw-material processors (ginning, spinning, fibre extraction). A DPP that captures only the brand's first-tier supplier will fail the conformity assessment. This pillar document is the single most comprehensive English-language reference for the textile DPP: regulatory anchors, mandatory data fields, integration architecture, supply-chain depth requirements, compliance risk register, and a buying checklist for brands evaluating DPP solution providers. It is written for decision-makers who will sign procurement contracts in 2026 and need to ensure that the platform they select still complies in 2028 when the delegated act enters into force. The textile DPP is fundamentally a data-architecture problem disguised as a regulatory one. Brands have spent two decades optimising for speed-to-shelf and unit economics; ESPR now demands the inverse — backward traceability through opaque, multi-jurisdictional supply chains that touch cotton fields in Uzbekistan, polymer plants in South Korea, dye houses in Bangladesh, and cut-and-sew operations in Portugal before a single SKU reaches a European warehouse. Every link in that chain must produce verifiable, machine-readable evidence of substance content, environmental impact, social compliance, and chain-of-custody. The brands that recognised this in 2024 are now mid-implementation; those waiting for regulatory certainty will face an 18-month build window that historically requires 24-30 months. This guide assumes you are starting now, in 2026, and need to compress that timeline without sacrificing audit-readiness. We treat the DPP not as a compliance checkbox but as the operational backbone for circular-economy reporting, EPR fee calculation, customer-facing transparency, and post-sale services like repair, resale, and recycling. The brands that win the 2028-2032 window will be those that turn the DPP into a competitive moat rather than a cost centre.