The only reason I don't like the Airframe helmet is due to the fact that it felt uncomfortable to me. Mich 2000 was way too big with lots of movement even with the straps tightened, Airframe had this tight squeeze feeling and also made it feel weird to look up (due to how long the back is) I just find the FAST helmet the perfect fit with the adjustable tightener so it doesn't wiggle, The low profile, short backing... Dont get me wrong The Airframe is a great helmet, It just doesn't like me.