SPEEDO Aqua Fitness Jog Belt * Made of soft flexible foam * Provides support and stability during deep water fitness exercises * Webbed belt with quick release clip * Available in 2 sizes-S/M, L/XL. * S/M: Belt adjusts to fit waist sizes 25"-48". Contoured shape fits smaller body frames. * L/XL: Belt adjusts to fit waist sizes 25"-56".