Try the AXO chest protectors, are made from one piece, no straps. I crashed once with another just before landing, my front went on the right side and i hit the ground with ~30 mph, direct with my shoulder (i didn't have time to take the hands of the handlebar) and than with the helmet. The impact was so big that the air holes from the arm protectors were printed on the skin. I was KO also, but the collar bone remains in one piece, the helmet does't hit it. When i tried to take my bike from the ground, a Suzuki landed with it's front wheel direct on my back (it was one of the fast guys) and bend the wheel. They tooked me out from the circut, i couldn't move but no back injury, only muscle pain. So don't tell me that chest protectors are only for ROOST