PROLAST MMA Boxing 100 lb Heavy Bags are designed for institutional, home, and commercial gym use. Professionally filled with cotton fabric and compressed from top to bottom for excellent balance and weighting. RIP-STOP exterior shell is weather proof for indoor/outdoor use and firm through round after round of intense training. Unique seatbelt nylon security hanging straps alleviate tangled chains with increased security. Increased width and length is ideal for throwing all punches, strikes and kicks for increased intensity. Two-tone assembly is quadruple stitched and crafted for intense training. Discover the PROLAST Advantage and you will not go back to a traditional heavy bag again.