A Mystic rash vest can add an extra layer underneath you wetsuit on those extra cold days and protect your wetsuit from rubbing. They can also just be worn as a layer on their own on those warm sunny days to give UV?protection from the sun (rated UPF 50+). They have flatlock stitching to be durable yet flexible and are made out of heavy quality rash guard which is soft and adds comfort. The rash vest are designed to dry quickly so you can keep warm. The rash vests come in different colours and designs to suit everyone.?