Features: Span Flex UV: Super elastic armpit for perfect movement; Flat Lock: Flexible, non-irritating seams; Slip Loop: Fine webbing loop for fixing the board shorts; Span Flex UV: Super elastic armpit for perfect movement; Sunglass Loop: Don't lose your sunglasses; Comfortable snug fitting rash for protection from UV radiation, rash & chill. Also functions great as a base layer under a wetsuit in colder conditions.