Ocean Wings are fabricated from an outer bag of 1000 denier nylon, backed with a layer of urethane to protect against abrasion and punctures. The inner bladder is constructed of polyurethane material, ultrasonically welded seams and fittings for added strength. Horseshoe - style configuration Inflator hose is positioned at the top center for use with double tanks Power inflator hose included Dump valve on the lower left side 1000 denier nylon outer bag with urethane backing protects against abrasions and punctures Zipper has an interior flap to protect inner bladder Inner bladder material is polyurethane material with ultrasonically welded fittings and seams A soft Single Tank Adaptor is recommended for use with a single cylinder for added stability Low Pressure (LP) inflation hose included Available in 45lb OR 60lb Lift Capacity