The Billabong Equator Generation short sleeve jacket is a 12 mm thick men’s rash vest that will provide you with extra warmth in warm waters or acts as an extra layer when worn underneath a wetsuit in colder water. The Generation Equator long sleeve wetsuit jacket features new Billabong technology resulting in an extremely stretchy vest. Check out the features listed below: 100 percent Airlite Stretch Neoprene Matt stretch regulator panels B-lock superflex stitches Boardshort fastener loop Strategic seam placement