Speedo® Fastskin® is 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. Jammer length styling with drawstring waist. Fabric: 74% polyester/26% Lycra® spandex. Import.