My youngest daughter was wearing this when she flipped her outlaw 50 quad making a sharp right turn at full throttle (Oops). The riding surface in the area was hard dirt and lots of little sharp rocks where she was thrown at. The hard plastic shoulder cups took the hard impact with the evidence to show it; but it held up great, no cracks just deep gouges in the plastic. The best part is that she got up and with the soft padding on the inside she suffered no injuries. She was happy to get back on because she wasn't hurt. A scary incident for a Dad but thankfully we got her the best fitting protection for just such an incident.