The arena Powerskin Carbon-Air² is our brand new racing design. We tweaked the construction of this women’s closed-back tech suit for ultimate flexibility and unified hydrodynamics. The exterior shell is made with a single piece of fabric for zero stitching, 100% comfort and drag-free speed. Inside the new 3-piece lining design lets your body stretch even further for total range of motion. This lightweight kneeskin is integrated with horizontal bands of carbon fiber that lock down on muscles for enhanced support and control. Engineered for powerful performance and long-lasting comfort while competing, the Carbon-Air² takes racing to the next level. Worn by Olympic Gold Medalist Katharine Berkoff, celebrated for her backstroke dominance and record-breaking performances in collegiate swimming. Fit Guidance: We recommend 1-2 sizes down from training suit size. If in between sizes, go with the smaller size.