Troy Lee Designs D4 Polyacrylite The Line MIPS Adult MTB Helmets Sweatshrts complemented by features like dual

complemented by features like dual elastic waist straps and durable YKK zippers for a tailored fit and added durability

and it’s even cut in ICON’s Sport Fit to provide comfort in an aggressive riding stance

two large thigh cargo pockets

long-lasting power to the Alpinestars Heat Tech System with an electronic controller for long life and security

Fast and easy tool-free shield changes

Troy Lee Designs D4 Polyacrylite The Line MIPS Adult MTB Helmets Sweatshrts complemented by features like dualTroy Lee Designs D4 Polyacrylite The Line MIPS Adult MTB Helmets The reigning king of full face helmets, the D4 range expands with a Polyacrylite model packing the same safety and comfort features as the premium carbon and composite models into a price conscious shell. Details make the D4 the most coveted full face in mountain biking, including Mips C2 brain protection, an air intake system for ventilation, and an unmatched anatomical fit. Mips C2