Speedo 805016 Endurance Square Leg Swim Trunk Speedo Black 36 Waist The same compact competition-ready design with the added benefit of generations of research, results, and new fabric technologies. Made of a knit blend of polyester and polyester PBT. Endurance+ fabric blend offers increased stretch capacity for a performance-driven fit and is more resistant to chlorine damage. Waistband is covered elastic. Internal drawcord on inside of waist for fit adjustment. Center back seam keeps fit close. Liner panel attached to inside front for comfort. Covered elastic leg hems maintain hold. Embroidered Speedo logo on left leg. Tag attached to underside of waistband at center back interior. Flyless.