From Mountain Hardware: 100% Nylon About this item LIGHTWEIGHT DESIGN: An ultralight hooded jacket made with Pertex Quantum Air Ripstop fabric to produce the optimal balance between wind resistance and breathability. WATER RESISTANT: Durable for blocking light rain and moderate winds. Fixed hood for added protection in hard-to-guess weather. PERFECT FOR ON-THE-GO: The Kor Preshell Hoody stuffs into its own pocket, letting you pack it up whenever and wherever you go for compact storage, FLEXIBLE YET DURABLE: Stretchy construction lets you move comfortably without sacrificing durability. Full-zip design for custom ventilation in warmer weathers. MULTIPURPOSE LAYER: When a hardshell and a midlayer is not enough, this jacket is the layer you’ve been missing. Suited for multi-sport versatility with two harness-compatible zippered hand pockets. Description When a hardshell is too much and a midlayer is not enough, the Kor Preshell™ Hoody is the layer you've been missing. It's both weightless and water-resistant⏤durable and pliable⏤roomy and stows in its own pocket. Call it an ultralight softshell or a super breathable wind shirt, but we just call it the do-it-all stretch layer for cool-weather trail runs, aerobic ski tours, big alpine rock routes, and...well, just about everything.