DetailsTYR Men's Size Chart Stay a step ahead of the competition in the TYR Men's Pytha Hero Jammer Swimsuit. Constructed with TYR's most durable textile, Durafast Lite® - the SPYT7A performance swimsuit utilizes high denier poly fiber and innovative circular knit construction to combine the strength and colorfastness of polyester with the comfort of spandex. TYR jammer swimsuits stop above the knee and feature both a compressive fit and adjustable drawcord waist. A championship cut and bold print amplify the suit's highly technical appearance. Allowing for unrestricted mobility, the jammer is ideal for athletes who want reliable coverage during every swim. TYR performance swimsuits are fully lined, provide UPF 50+ sun protection, 360 degree range of motion and an antimicrobial lining for freshness. All Durafast Lite® suits are chlorine proof and sustain an impressive 300+ hours of performance.