New with tags, Lightweight and airy fabric has a subtle crinkle texture, Adjustable bungee for a custom fit, Secure zip pockets to store your essentials, Mesh ventilation on back helps keep you cool 80% Cupro Rayon/20% Nylon LOWER IMPACT MATERIAL: Cupro is a regenerated cellulose fiber made from recycled cotton remnants left after the production of cotton seed oil WATER-REPELLENT: Durable Water Repellent (DWR) fabric finish uses non-PFC based technology to protect against light-to-medium rain