VIPER Free Standing Boxing Punch Bag. THE VIPER FREE-STANDING PUNCH BAG IS A GREAT WAY TO WORK OUT AND DEVELOP CO - ORDINATION AND SKILL WITHOUT THE NEED FOR A PARTNER.THE VIPER PUNCH BAG IS A FREE STANDING PIECE OF EQUIPMENT TO BE USED AS YOU WOULD ANY OTHER PUNCH BAG. Ideal for martial arts, Muay thai, boxing and fitness. Shock Absorption High Dense Inner Layer with Upper. Picture is for illustration purpose, (Could be slightly different). Opening a case/ request and. We hope you will understand and we will be happy to assist you.