Unisex Bionik Sleveless Wetsuit Made of the Yamamoto # 39 with SCS all over the wetsuit. Unisex Sizing. Thickness 4.5 mm. This is the perfect suit for warmer water swims. Unisex Bionik Sleeveless Wetsuit Y M2019-02-13T21:44:21+00:00 Share This Story! FacebookTwitterRedditEmail Related Posts Black Friday Sale 2019 Black Friday Sale 2019 Best In Class – Cell Gold Best In Class – Cell Gold Swim Function Wetsuit. Swim Function Wetsuit. Aquaman US in Boston Aquaman US in Boston Meeting with Club Team. Meeting with Club Team.