Open back Designed to provide kinetic chain and muscle system support to increase energy and propulsion High-tech material for compression fit, minimized water drag and advanced water repellency Competitive swimming: High-performance swimwear with a compression fit for optimal racing Very compressive fit: We recommend to buy a larger size if you prefer a looser fit Material: Nylon/Spandex Available 1 in each size 24” 28” 30”