Sand dumbbell set 1.Material:Neoprene 2.Color:multicolor 3.Stuffed:iron sand, ... , ankle support, etc. (3) Sandbag:oxford fabric sandbag, neoprene iron sand bag, neoprene overlock sandbag, adjustable iron bar sandbag,etc. (4) Neoprene bag:cellphone ... laptop bag, inner laptop bag,etc. Neoprene Safety Sand Dumbbell set