Speedo Women's Hyperspark Solid Openback Kneeskin Tech SuitFastskin HyperSpark: Your journey to unstoppable starts here Take your race day performance to the next level wearing the new Fastskin HyperSpark Openback Kneeskin. Our newest Fastskin race suit is designed for speed and comfort with flexible knitted fabric and flatlock seams. Sewn dual layer inner panels provide low level compression at the core and legs, so you can conquer the competition in style and comfort. Flexible, low profile comfort straps