Oceanic Lavacore Unisex Scuba Diving Hood - Large OUTER lycra layer is a 180 g/sqm knitted knylon wrap knit Tricot with water repellant treatment to ensure fast water run off and anti wind chill properties. INTER layer is an impermeable breathable Microporous high stretch PU film which is wind proof and breathable allowing perspiration to be drawn away in hot conditions. INNER Fleece layer is a 240g/sqm 4 way stretch polyester fleece with elastane. It has Anti Pill treatment, as well as Anti Microbial treatment to reduce odour and eliminate bacteria. Sun protection of SPF 30+