This 182cm (6 ft) bottom filling NAUI surface marker buoy (SMB) features; anti-spill baffle, overpressure-valve (OPV), reflective stripe around the top and a top loop for marker-lights during night dives. The advantage of an OPV is that it can be deployed at your stop depth without the risk of rupturing the bag, excess pressure will be vented out as the bag ascends. Made from 100 % Nylon Fabric with a TPU coating for added strength in all water conditions.
