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 different colors available.