D4 Polyacrylite Helmet W/MIPS Shadow Blue Size:S Ventilation is provided by the

Ventilation is provided by the 11 air intakes and 14 air exhaust ports to help keep the head cool

The Polylite chinbar features massive openings for ventilation

Mips® C2 protection system is used to add an additional layer of safety in the event of a fall

This helmet is designed and intended exclusively for off-road dirt bike riding

A motocross kit is only as good as its ingredients

D4 Polyacrylite Helmet W/MIPS Shadow Blue Size:S Ventilation is provided by theThe 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.