F3 Windstopper LinerAdd the F3 Windstopper Liner to your F3 helmet for added protection from wind and cold weather. Works with all F3 helmets: F3 Carbon, F3 ECE, F3 ECE/DOT.F3 Windstopper Liner $14.99 Color: Size : SM MD LG SIZE CHART SKU: 3868-000 Quantity -+ Add to Cart Find in-store WARNING for California Residents