Gym Weight Lifting Climbing Magnesium Anti-skid Carbonate Chalk Sport Training It can provide better grip over barbell, dumbbells and slippery surfaces It is made up of magnesium carbonate which acts as a drying agent by absorbing sweat from hands Great gifts for athlete Material: Magnesium powder; Color: White Overall Size: approx. 3.54*1.77inch/9*4.5cm