Streamlined Fastskin-inspired aesthetics.Streamlined Fastskin-inspired aesthetics. This sleek Racerback Legsuit takes inspiration from the contouring seam lines and design details of our medal-winning Fastskin range so you look and feel confident during fitness training. The racerback design aids shoulder movement and offers increased back coverage, while the comfortable bust underband provides support. Made from our quick-drying, 100% chlorine-resistant Endurance+ fabric, it offers outstanding durability, no matter how often you swim.