I have two grandsons that are very aggressive dirt bike riders. I had already purchased a Leatt neck brace and chest protector for the 14 year old. I soon realized the 9 year old was getting aggressive with his riding as well. A friend sold me his Leatt neck brace that he outgrew. It was not compatible to the 9 year olds chest protector. Got a great piece from Motosport and feel much more confident that these boys are better protected.