This collaboration between Descente Allterrain and JJJJound merges expedition heritage with contemporary urban style. The jacket employs sleeping bag-inspired baffle construction to eliminate cold spots while maintaining exceptional warmth-to-weight ratio. PERTEX® Diamond Fuse outer fabric delivers abrasion and water resistance, while the weft utilizes NetPlus® recycled nylon recovered from fishing nets. Lightweight 20D mini-ripstop weave provides wind protection without bulk, paired with premium 750 fill-power down for superior insulation. Practical details include adjustable drawcord hem, hand-warmer and chest pockets, plus PFC-free water-repellent treatment. A technical layer designed for everyday wear.