100% brand new and high quality. Material. Shell. Polyester 100%; Core. Neoprene 100%; Skeleton. 4 steel bones Easy to put on and take off: the upgraded sauna vest has a zip, making it easier to put on and take off than a pull-on sweat vest. Fits snugly around your body and comfortably keeps your shoulders straight. A great men's weight loss sweat vest Size S 83-94cm chest, 72-81cm waist Size M 94-100cm chest, 81-87cm waist Size L 100-106cm Bust, 87-94cm Waist Size XL 106-113cm Bust, 94-100cm Waist Size XXL 113-119cm Bust, 100-106cm Waist Size XXXL 119-127cm bust, 106-114cm waist Included. 1*Vest Caution. 1. Due to the different monitors used, different computers and different angles of the photos, there may be colour problems with the angles. 2. 2. Purely manual measurement, there may be 0-1cm error.