1mm diameter

Armour holder

The air suspension back panel works so well that you'll wonder how you ever did without it

• Open mesh inserts on arm hole area give enhanced breathability

Compatible with most bike frames

TLD D4 Polyacrylite MIPS Helmet - M-L - Shadow Blue Ignore Wholesale Tier 2 Brand Rule 1mm diameterD4. Redefining everything 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. This helmet is designed and intended exclusively