Turns out I don't have a Soumy head, I've tried several times but they just don't work for me. For reference, a Shoei XL fits flawless and that is exactly how this helmet fits me initially. My issue is after about an hour a pressure point forms making it uncomfortable. This helmet was worn twice on street rides, then kept in my gear bag as a back up at the track. Got a new Shoei, so this back up is no longer needed. In excellent condition, near new. Come with light smoke screen installed, and never used clear.