Ergodyne? ProFlex? 1100SF Black standard back support is adjustable and detachable with the stretchable zig-zag stitching. Back support has patented power panel positioners for elasticity and is ideal for construction/warehousing. Standard Back Support. Color: Black. Size: 4X. Patented non-conductive Sticky Fingers stays. Innovative Power Panel Positioners. Durable 280D spandex body material. Adjustable, detachable suspenders. Stretchable bias binding with zig-zag stitching. 4XL. Black. Patented V-shaped design. 280D spandex body material. Fits waists: 52" - 58". Application: Material handling, construction, warehousing/distribution, maintenance, freight/baggage, assembly/fabrication, landscaping/grounds, sherpa porters. Nylon 40%/polyester 10%/latex 10%/spandex8%/poly-p 8%/vinyl 4%. Closure type: Adjustable two stage. 9 3/4"L x 2"W. Ergodyne ProFlex 1100SF Black standard back support features patented non-conductive sticky finger stays that provide firm/abdominal support and durable 280D spandex body offers consistent stretch.