Great helmet for the price! Fits great, looks great, is warm and also ventilates. The adjustment knob on the back is perfect for that custom brain bucket fit and doesn't bother my son whatsoever. Going off the fit chart my son was right on the cusp between the S and the M. Went w/ the M (room for growth) which ended up being way to big. I think the helmets are a little on the larger side from the specifications. Went down to the S and the fit was much better and still has room to grown into before handed down. Overall great helmet and Smith makes great products! "They do make the great days better!"