Amazon.com : CAP Barbell Chalk Ball for Gymnastics, Climbing & Weight Lifting, 2 oz (56g) : Sports & Outdoors
American Alpine Institute - Climbing Blog: Do I need Climbing Chalk...?
Friction Labs Magic | Nachfüllbarer Chalkball | für einen Guten Griff | ungiftig | ideal für Klettern, Turnen, Klimmzüge, Sport, Gewichtheben, Kreuzheben, Kugelhanteltraining und Pole Dance : Amazon.de: Sports & Outdoors
Beasty Chalk - Chalk Ball, 80 Gram - Premium Gym Chalk in Refillable Sock - Non Toxic - Great for Climbing, Gymnastics, Weightlifting, Crossfit, Pool, Training