Our Chalk Ball is ideal for indoor and outdoor use. Fitting perfectly in your chalk bag, the mesh-covered ball lets out just the right amount of chalk with every squeeze. This climbing chalk ball provides superior grip and will dramatically reduce sweat. The chalk ball contains approximately 55g of top quality magnesium carbonate. It lasts up to 4 times longer than block chalk, and because the chalk is contained in a fine mesh ball, greatly reduces dust and pollution.