I don't know my fight record with heavybags but it's alot and I mostly win, occasionally I lose (jambed/sprained wrist) like everybody else I can beat the hell out of a heavybag and this bag is the best ever it does not sting when you hit it or feel plasticy. penetration is perfect they just sink right in there and the bag recovers and retains its shape and it feels awesome ! The quality is second to none ...the best ! If I was going to outfit a gym PROLAST would be my choice period. Thanks PROLAST you guys are awesome !