Zoot Z Force 1.0 Sleeveless Women’s Triathlon Wetsuit Size XS This suit features an updated Optimal Kick Design which is a leg patterning that allows the wetsuit to work with your anatomy rather than fight against it. Benefits include increased kick velocity, frequency, and efficiency. The suit also has a DORSALflex zipper which is an essential 2mm piece of neoprene around the back zipper that gives better stretch for improved lung expansion. As well as all the other great features, this wetsuit also features maximum buoyancy . Sz XS