A jammer is a style of swimsuit worn by male swimmers, used mainly in competition to obtain speed advantages. Constructed with Tiun's most durable textile, performance swimwear utilizes high denier poly fiber and innovative circular knit construction to combine the strength and colorfastness of polyester with the comfort of spandex. Tiun boys' 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 boys who want reliable coverage during every swim. Tiun swimwear collections are fully lined, provide UPF 50+ sun protection, 360 degree range of motion and an antimicrobial lining for freshness. All Hoog suits are chlorine proof and sustain an impressive 300+ hours of performance.