SPEEDO ENDURANCE SPLICE Ultraback SWIMSUIT, 18 Speedo Endurance+ is our exclusive 100% chlorine resistant fabric that is designed to last 20 times longer than ordinary spandex. Speedo Endurance+ features 4-way stretch technology for a body-hugging , comfortable fit. Built with Speedo Hydro Bra, our most extreme swimwear support system strategically engineered to provide an athletic fit with added support and comfort. Moderate cut features a middle length height. Fabric: 50% Polyester/50% PBT.