Specifications Brand NameDIDEEPProduct nameDiving BCDColorBlackSizeS M LMaterialHigh Quality NylonBuoyancy25LBSBackplate FixingDouble Support SizeBuoyancyWaistline3XS7 3kgf 16 0lbf 70N 23 35 inch XXS7 3kgf 16 0lbf 70N 24 36 inch XS9 3kgf 20 5lbf 9ON 25 37 inch S10 3kgf 22 4lbf 100N 29 39 inch M15 3kgf 33 6lbf 150N 33 40 inch L16 3kgf 35 8ibf 160N 37 44 inch XL18 4kgf 40 51bf 180N 41 48 inch XXL18 4kgf 40 5lbf 180N 44 53 inch 3XL18 4kgf 40 51bf 180N 48 57 inch The above parameters are for reference only please refer to the actual product Package includes 1 x Scuba Diving BCD