Eyewear Compatible

Hook and loop calf adjusters

Full Flex stretch panel at the back yoke for greater mobility in riding position

Silicone print for grip

and with a world-class team of designers and engineers leading the charge

Troy Lee Designs D4 Polyacrylite The Line MIPS Adult MTB Helmets Kaddy Kruzer Eyewear CompatibleTroy 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