Outlast treats sustainability as a documentation discipline first — every claim on this page is matched to a certificate scheme, a test method, or a facility scorecard the buyer can request. Outlast performance and ingredient fiber sustainability evidence stays at parity across renewal cycles for continuous audit.
| Area | Buyer evidence | Review cadence |
|---|---|---|
| Chemistry | ZDHC MRSL or REACH screening route | Annual or formula change |
| Recycled input | GRS/RCS transaction document request | Per lot where claimed |
| Facility impact | Higg FEM or water and energy ledger | Annual |
| Product safety | OEKO-TEX 100 certificate request | Certificate validity period |
Method records: AATCC, ASTM, ISO and EN method results are kept per construction and per finishing route — the buyer's lab can request the matching record. Outlast restricts Performance Fabric & Membrane sustainability claims to what active certificate scopes support.
Common questions: what does each certificate cover, how often is it renewed, which articles fall inside the certificate scope, and where the original scan can be obtained. Outlast reports Performance Fabric & Membrane sustainability against scheme face, scope and validity rather than narrative claims.