Speedo Mens Endurance+ Hyperboom Splice Jammer, classic sports styling, straight from the speedo design archives. This sporty hyperboom jammer nods to Speedo's brand heritage with a revival of the iconic go-faster boom logo stripe. It's cut with a front support liner and an adjustable drawstring for comfort and security during training. Be ready to go again in the quick-drying endurance+ fabric, designed for durability with high chlorine resistance.