SHOUNg Ab Trimmer for Men with Back Strengthening (Black, Size L) Soft woven fabric design, comfortable fit, with a super extension stretch ability, Feel and look your best while promoting safe lifting techniques. Enhanced special support bracket design in the back of the belt to avoid back strain while you work. Two additional side pulls for better lifting and tension adjustment. Strong sewing workmanship to ensure the safety of your movement. Adjustable straps to to custom fit your needs. Designed with very breathable fabric to avoid skin irritation, itching, and other issues from prolonged use. Our worry-free 12-month warranty and friendly customer service.