The Superalloy jacket's main fabric contains approx. 60% castor bean extract. It's a great choice when you leave camp to climb a mountain or two, and why not for foul weather runs as well. The jacket can be packed into its own pocket. Due to the ultralight nature of this product, we don't recommend carrying a heavy backpack with it. A light daypack is ok. - Spacious fit - Waterproof, windproof, breathable, seam sealed - 2.5 layer structure: instead of a mesh or fabric liner, the inside of the membrane has an ultralight material print - Elastic cuffs - One zippered chest pocket - Integrated hood with peripheral cord adjustment - Hem adjustment cord - Center back length 74.9 cm This is a PFC-free and PFAS-free product.