For lower back support and abdominal lift. Effective in toning and shaping waistline when worn during athletic activity. Helps provide constant heat and moisture to lower back musclesHas 1/8" thick neoprene with a double knit nylon exteriorWashing Instruction Hand wash in cold water with mild soap. Rinse thoroughly. Air dry at room temperature. Do not machine wash or dryComposition 75% Closed cell neoprene foam, 25% Stretch nylonPackage Contains: 1 Waist Trimmer Belt