All new, the Z Force 3.0 Sleeveless wetsuit has been upgraded with a new chest panel design for great flexibility and a more evenly balanced feel. GLIDEflex grooved panels to increase stretch for maximum lung expansion, shoulder rotation and shoulder extension. The Zero Water comfort neck panel eliminates neck constriction to create an extremely low profile neck seal that limits water entry and stops chafing. OKD, Optimal Kick Design is Zoot's proprietary kick design, helps your legs stay in the natural body position to kick - save your legs for the bike and run. Designed with Yamamoto Cell 39, the Z Force 3.0 SL is an exceptionally comfortable high performance wetsuit.