Descente Mizusawa Down Goes PFAS-Free: Fewer Seams, New Nylon

Descente has changed the outer fabric of its 2026 FW Mizusawa Down line, replacing polyester with water-repellent nylon made without PFAS, a family of fluorine-based chemicals. The new fabric also appears in the Oversized MOUNTAINEER, a jacket co-developed with fashion brand Graphpaper.

Fewer Seams, Smarter Venting

Mizusawa Down was designed to tackle a common weakness of down jackets: once wet, down loses loft and warmth. Introduced in 2008 after a rethink that began in 2007, it is made at the Mizusawa factory in Oshu, Iwate Prefecture, Japan. Instead of stitched quilting, which leaves needle holes where water can enter, heat bonding forms the down compartments. Seams that remain are sealed with tape. Descente says production involves more than 280 specialized processes.

The jacket keeps its dual-zip ventilation, with mesh between two zippers so wearers can release heat and moisture without taking the jacket off. Unlike fabric breathability, venting moves air through an opening, and it can be closed in wind or cold.

The shell is 58% nylon and 42% nylon-based composite fiber, the lining is 100% polyester, and the fill is 90% down and 10% feathers. Graphpaper widened the body and sleeves and shortened the length while the heat-bonded construction stayed the same. Descente applied PFAS-free nylon across its Mizusawa Down range from 2026 FW, including the standard MOUNTAINEER and ANCHOR. The 20,000 mm water resistance and 10,000 g/m2 per 24 hours breathability figures belong to the regular MOUNTAINEER line, not this collaboration model.

Why It Matters

The update shows that progress in technical outerwear often happens inside the fabric, joins and ventilation rather than in visible styling. It also reminds buyers that PFAS-free finishes should be judged on durability, not treated as proof of a fully eco-friendly garment.

Read the original article in Korean: K trendy NEWS