The S1 Lifer Helmet is designed to take a beating whether you're skating outdoors, ramps or roller derby. The S1 Lifer Helmet is a great fitting certified high impact helmet . Please measure your head to size correctly. Your helmet should always fit snug and shouldn't bobble around on your head when you shake it. You should be able to skate with no movement of your helmet. A proper fitting helmet does not require the strap to keep it in place. The S1 fits most people great, but if you have a rounder head with wider sides the Triple 8 or TSG may be a better fit for you. If your head measures 18.5 - 20.5" check out the S1 Mini Lifer Helmet. If your head measures 23." - 25.5" check out the S1 Mega Lifer Helmet. If your head measures 20.5" - 23.5" this is your correct S1 Lifer Helmet, available in a range of sizes: XS, S, M, L, XL, 2X and 3X. Please write your size selection in the Customer Notes section. xs 20.5 in Small 21 in Medium 21.5 in Large 22 in X Large 22.5 in XX Large 23 in XXX Large 23.5 in
