Waist Trimmer Belt Features: * Thickness: 3.5 mm * Color: Pink / Black * Material: Neoprene/Nylon/Rubber * Medium Size: 39"x8" fit up to 20"-44" * Large Size: 45"x9" fit up to 25"-50" Waist Trimmer Belt Perfect For: * Improves Posture * Supports Lower back * Retains Muscular Warmth * Therapeutic Fat Burning Heat * Protects and Prevents Injury * Helps Shed Excess Water and Toxins * Removes Pressure from your Back Muscles How To Wear Waist Trimmer Belt: Waist Trimmer should only be worn during exercise for no more than 2-3 hrs at a time. Before you begin exercising, adjust your Waist Trimmer to desired position and wrap it comfortably around your abdomen. Waist Trimmer can be worn under or over your clothing but is designed to be most effective while worn under clothing. How To Wash Waist Trimmer Belt: Before initial use: Wipe down the Waist Trimmer with a damp cloth. Use a clean cloth to dry off Waist Trimmer or air-dry overnight. After each use: Lather a damp cloth with soap and run down inside of Waist Trimmer several times. Then, rinse the cloth and wipe down again until there are soapy streaks left. Use a clean cloth to dry or air-dry overnight. Allergy Notice: Some individuals may be sensitive to Neoprene or Neoprene blend rubber. If a rash developed, you should stop to use it immediately. Before starting any exercise routine please consult a physician. Always stay monitor your body why exercising and remember to stay hydrated. Kindly Note: * Do not wear while sleeping; * Do not wear over wounds or dermatitis skin; * New Neoprene smell like as "wetsuit smell".Don't worry,it will be disappeared in short time after open in air.