Performance compression swimwear packed with innovation. The Speedo Jammer features a raft of technologies designed to help you accomplish more in training. Targeted quadricep compression achieved through internal powermesh panel and glute support seam help to promotes increased kick power through reduced muscle oscillation. The jammer has a V-Cut construction for padded comfort and security, and a drawstring waist for enhanced fit and security. WINCOOL yarn helps regulate your body temperature during training while anti-bacterial technology helps to keep your suit fresh after you workout. Ultra chlorine-resistant, our INVISTA Lycra Xtra Life Fabric lasta twice as long as standard swimwear.