Hand wash in cold water with a soft detergent, Hang Dry to Maintain Shape & Elasticity. | Sauna Suit Target Training: Upper Body. Wearing a sauna suit during aerobic exercise can help you shed water weight. | Material: Inner Neoprene + Outer Polyester. This exercise sweat vest gives you back support, and guarantees a correct posture during your workouts,retains body heat to help you burn more calories. | Neoprene upper body shaper stretches and conforms to the the main part of the upper body for important sweat loss of additional pounds and at the same time super stretchy tripple stronger material offers freedom to move , suitable for all kind of activities, especially gem,workout,outdoor and MMA workouts. | Please measure your waistline (1 inch above navel) and read the left size chart (the last item picture) to choose your best size. For any concerns about the neoprene suit men, please contact us freely & we are always happy to serve you.