The OMS Performance Mono wings are a classical donut-style. The wing has a an inflator integrated pull dump OVP at the left shoulder and an OVP at the left hip and has two bladders, the outside bladder has a TPU laminated liner. The second bladder is ultra sonic welded. The outer bladder has a YKK Large teeth zipper. There a single tank adaptor incorporated in the back of the outer bladder. Wings come in 27lbs (12.5kg), 32lbs (14.5kg) and 5 colors, Black, Red, Red/Black, Pink/Black, and Grey Black. Specifications: Performance Mono Wing. - Donut-Style Wing for use with single cylinder only. - Light weight (approx. 1.4kg) ideal for traveling. - Lift capacity: 27lb (12.5 kg) /32lb (14.5 kg). - Corrugated hose with rapid exhaust valve. - Dump valve / over pressure valve front side left. - Very rugged because of the dual shell construction. - Outer bag made of 1000 denier nylon. -Outer bag laminated with TPU material. - Inner bladder polyurethane material, ultrasonically welded fittings and seams. - Large YKK high quality Zipper for inspection / exchange of the inner bladder. - Color: black, red, red/black, grey/black, pink/black. - Inflator hose is included. - OMS logo. Sales Features: Competitors: - do not have TPU inner lamination they use spray on PU. - do not reinforce grommets. - use small ykk zippers.