Hanging bags tend to be the best since the swing may be adjusted to best simulate a moving opponent. However, the bags must be hung from a solid support, either a rafter, brace between rafters, or from a purchased or homemade self-supporting frame. Some heavy bags come with a bungee cord that extends from the bottom of the bag to a mount attached to the floor to help prevent the bag from swinging. If you wish not to mount the hardware on your floor, you may attach the cord to a bar bell weight plate or to a patio table umbrella weight.
The self-righting bags do not need to be hung; they may be placed anywhere, which makes them ideal for those who live in apartments. To increase stability of the bag, clean, pure sand may be used with, or in place of, the water. These bags tend to slide and wander about the floor; a rubber mat placed under the bag will reduce this movement.
Homemade. Empty bags may be purchased or made and military duffle bags may be used. The bags should be stuffed with something resilient that will not settle and harden. Shredded cloth works OK but cotton offers the best results. Cotton is expensive, so, to save money, cotton may be removed from old mattresses. The bag should be stuffed as firmly as possible. To add weight, fill plastic baggies with cat litter and stuff them down the core of the bag.