... Waist Trimmer can give out Far Infrared Ray, the Far Infrared Ray can help sweating in local area ... , it will help to increasing the Far Infrared Ray's effect.2. If you offen need to ... : Handtailored Sponge(super tight)3rd layer: Far Infrared Ray Material 4th layer: NeopreneIt fits for waistline from 56 ... cm to 98 cm. The Far Infrared Ray will effect your waist, promoting the sweating effect. ...