Jink MMA Dummy Jiu Jitsu Judo Punch Bag Tough Cordura Fabric Standing Position with Open Hands Boxing can help hone hand-eye coordination. The Jink Dummy Bag Can be Weight Up to 40" 25KG, 47" 35KG, 59" 45KG, 70" 55KG . Unfilled product. Images are for illustration of the final looking product once you fill it. This product can be filled up by recycle textile cuttings or shredding. Can also be filled up with raw cotton or any suitable filler material. Made of Special Tough Cordura Fabric . Boxing is an incredible mechanism for improved body composition because it perfectly combines muscle-building strength training moves and calorie-torching bouts of cardio. Plus, most boxing gyms incorporate other strength training moves into a boxing workout.