The SPRI Chalk Ball is great for weight lifting, gymnastics, rock climbing, and high-intensity workouts by helping to keep hands dry, and prevent blisters and calluses while reducing slippage during your workout. Get all the dry hands benefits from a traditional chalk block, but without all the crumbly mess. The premium-grade pure, non-toxic magnesium carbonate is packed inside a cotton sock, and tightly secured so chalk will not spill out of the top. Absorb and eliminate moisture to keep sweaty hands dry. Comes in a pack of two.