Aquatherm fabric. Outer Surface - fast drying, UV protecting, watershedding, matt black & breathable. Seams - durable waterproof taping covering seams. Inner Surface - soft feel, fast drying polyester stretch knit. Compact - packs up small for travellingThe only shorts constructed with pre bent seat and waist. Fit best when sat or kneeling for paddling. Maximum stretch direction across the front and up the back panels ensuring a snug fit during movement.