This buoyancy bag is deflated from the bottom opening, and the sling and stainless steel D-ring can easily connect objects that need to be lifted. OPV combined pressure relief valve and long drawcord at the bottom for precise adjustment. which can effectively prevent water from seeping into the lift bag during use, very suitable for divers for diving, swimming, scuba diving, snorkeling, free diving, underwater adventure, fishing, boating, canoeing, spearfishing, etc. The eye-catching buoy bag is foldable and easy to carry, helping you to move and tag underwater. A must-have gift for your diver friends. lift bag is used to help divers raise objects from depth to the or move them horizontally from one location to another.Perfect for salvage projects and also can be used as a marking buoy for decompression or stops. Colour:B:Yellow Material:nylon Package Contents: 1 * Diving Buoyancy Lift Belt Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.