The Speedo Endurance Jammer are built from high-performance Endurance+ fabric for superb resistance to fading, snagging and chlorine. The 100% chlorine contains no elastane and is quick-drying for a master stroke in the water. Finished with a drawstring waistband for a secure fit. - Endurance+ fabric resists; chlorine, fading and snagging - Drawstring waistband