Together with the four-way stretch mesh main body and flat seams construction

The product label may differ slightly and be in US sizing

Troy Lee Designs Dura-Mesh and Dura-Tech materials provide ventilation and durability in key areas

See the size chart for more information

D4 Polyacrylite Helmet W/MIPS Shadow Blue YOUTH AIR GLOVE Together with the four-way stretchThe 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.