Sleeveless wetsuit made of 1.5MM SCR neoprene material with a front zipper for ease of movement. Swim John Equivalent to size M I bought it but didn't use it, so You can wear it all year round except winter if you put a top over it. Also as innerwear for wetsuits. New Surfing Diving Skin diving etc. - Brand: DIVE & SEA - Material: 1.5MM Jersey - Design: Sleeveless, front zipper - Color: Black and blue