SPRI Chalk Block (2oz.) for Gymnastics, Rock Climbing, Bouldering, Weight-Lifting, Crossfit - Sold as Singles and 4 or 8 Packs GYM CHALK BLOCK - 2oz magnesium carbonate, pigment free, non-toxic chalk block keeps hands dry, prevents blisters and calluses while reducing slippage during your workout IMPROVES GRIP AND HANDLE: Great for gymnastics, rock climbing, bouldering, and all power and weight lifting activities including deadlifts, pull-ups, kettlebells and more KEEPS HANDS DRY: Absorbs and eliminates moisture keeping sweaty hands dry and does not easily rub off so you can lift or climb longer with confidence EASY TO USE: Block can easily be broken apart to refill your climbing chalk bag or stores well in a Ziploc bag or small Tupperware container SUPER GRIP: Also great for other grip-intensive activities such as yoga to keep your mat dry for a superior grip