ExoTrinity Sports EXO Chalk EXOCHALK is the highest quality 100% Mangnesium Carbonate Chalk For when you need a PERFECT GRIP Soft loose chalk in a cotton bag (non-reusable) EXOCHALK is designed to never let you down - when your life, career or reputation relies on the BEST grip - you choose EXOCHALK Available in two sizes 3oz or 2oz chalk ball/bags