Rob Allen's unique 650gram Drop weight allows you to easily add or remove a weight at anytime, even whilst in the water to fine tune your buoyancy on the fly. This is of real benefit when changing wetsuit thickness's to a more Buoyant Winter Type wetsuit, you easily add or remove from existing weight belt system in a flashThe weight also doubles as a handy drop weight, simply connect the weight and drop it to anchor your float system which acts as marker buoy to point out a Reef edge, Bommie or Wreck!