The Carbon Claw Arma AX-5 4ft synthetic leather punch bag boasts a 20mm foam lining giving great feel & response on each hit, letting you improve your technique, power & strength. The punch bag is filled with compressed cloth material & made from strong cross-fibre synthetic fabric, so you can be confident that it will withstand heavy punches during your training sessions. The 4 metal D-rings with 4 heavy-gauge webbing straps ensure safety when hanging the bag, & there is an additional D-ring at the base for fixing weight to it or for stopping it from swinging.