Speedo® Fastskin® is one of the most technically advanced swimwear ever made. Unique fabric mimics a sharkskin with dermal denticles-tiny hydrofoils with v-shaped ridges that decrease drag and turbulence around the body. Muscle compression components reduce muscle vibration. Seaming improves muscle coordination. Brief styling with drawstring waist. Fabric: 74% Polyester/26% Lycra® spandex. Import.