Independently re-audited 2026-08-02

ISTO

Portuguese essentials brand using organic cotton, linen, wool, and recycled materials, with numerous 100% GOTS organic-cotton garments.

Website / where to buy Back to directory

80Purely Score

Strong natural-fiber focus

Main fibersCotton, Linen, Wool / Merino

CategoryMenswear, Womenswear, Basics, Tops, Outerwear, Denim

100% natural-fiber fabricVerified options

Plastic-free constructionNot brand-wide

Purely Listed analysis

A transparent Portuguese essentials brand with many 100% organic-cotton, linen, and wool products. Good On You independently rates it “Good” and confirms high use of lower-impact materials and substantial supply-chain tracing. The catalog also includes recycled materials and animal fibers. No brand-wide plastic-free claim is assumed; sewing thread, elastic, linings, closures, finishes, and trims still require product-level confirmation. The score is brand-wide: an excellent 100% natural-fiber item does not make a mixed catalog synthetic-free.

What to verify before buying

Confirm the exact product page and care label for fiber percentages, sewing thread, elastic, labels, linings, closures, finishes, coatings, and packaging. “100%” normally describes the main fabric unless the brand provides a full component bill of materials.

Best for

Heavyweight organic-cotton tees and sweatshirts, linen shirts, flannel, and classic Portuguese-made menswear.

Material risk

Mixed recycled and natural materials require item-level review. Buttons, horn, leather, trims, and thread are not universally plastic-free or vegan.

Score rationale

Full-audit score retained. Breakdown: 36/40 materials, 12/20 plastic-free construction, 12/15 natural-fiber catalog focus, 7/10 certifications, and 13/15 transparency and independent evidence.

Score breakdown

Materials36 / 40

Construction12 / 20

Catalog focus12 / 15

Certifications7 / 10

Evidence13 / 15

Audit evidence

Re-audited 2026-08-02 using the current official catalog and product evidence, then cross-checked against directory.goodonyou.eco, wwd.com, sustainabilitytracker.com. Independent sources were used to corroborate composition, certifications, construction, catalog scope, or transparency; unsupported component claims were treated as unknown. Evidence confidence: High.