Fabric: 80% Nylon, 20% Xtra Life Lycra; Lining: 90% Polyester, 10% Spandex (Front lined for added comfort and durability) Premium quality: Extra Life Lycra fabric for lasting fit, 5-10x longer than Spandex. Super-strong flat-lock stitching. Advanced compression technology for enhanced performance and muscle support Soft compression blend: Enjoy improved comfort and superior shape retention for a supportive yet comfortable fit. Color protection: Hand wash in cold water and air dry. Avoid drying in direct sunlight Constructed from 100% nylon, this swim jammer is built for durability and exceptional performance. Designed for men's and boys' swim racing and training, this pro athletic jammer features a non-slip, flat braided drawcord for a comfortable and secure fit. It is a high-performance swimwear essential perfect for competitive racing and intense training sessions. Precision-crafted, this swim jammer enhances muscle compression, providing the support and coverage needed to excel in the pool. Swimmers who demand the best from their swimwear will appreciate the reliability of this swim jammer.