Sézane: June 2026

Based on our analysis of 572 Sézane products, the average garment is 83.6% natural fibre. The most common single fibre is Cotton (in 67.5% of products). The remaining material is typically synthetic — polyester, polyamide, or acrylic.

Sometimes — cotton appears in 67.5% of the 572 Sézane products we analyzed, but it's usually blended with synthetics. Only 64.5% of items are nearly all-natural (95%+ natural fibre), so check the composition before assuming a piece is pure cotton.

Effectively no. We didn't find any Sézane products that are 100% cotton (or near-pure, 95%+) in our database. Cotton at Sézane is almost always blended with elastane, polyester, or other fibres.

0.9% of Sézane products are polyester-heavy, meaning polyester makes up 50% or more of the garment. This is below average for fast fashion retailers.

0.9% of Sézane products are polyester-heavy (50%+ polyester). Average natural fibre content is 83.6%, so the rest of the catalog is mostly natural-led.

64.5% of Sézane products are nearly all-natural (95%+ natural fibre). A decent portion of their range avoids synthetic fibres entirely.

Fabric composition is one factor in sustainability. With an average of 83.6% natural fibre, Sézane is better than many competitors on this measure. Natural fibres generally biodegrade and shed fewer microplastics than synthetics.