Shoei set out to design the quietest helmet possible and came up with the aptly-named Qwest. Five shell sizes and six EPS liner sizes present increased fit options that help to comfortably fit most head sizes. Call us at 1-800-CYCLEGEAR or see it on our site: http://www.cyclegear.com/productlist.cfm?kw=Qwest&L1=5000&L2=1&L3=1004