After buying a helmet a few years back that has the turn-tight on the webbing similar to a construction hardhat, I will never go back to the chinstrap only style. I always felt like I was being choked by the chin strap before, and if I left it loose enough so it didn't strangle me, it moved around on my head all the time. I still use the chin strap, but it's only there to keep the helmet from falling off if I get jarred hard on a trail or something.