Troy Lee Designs D4 Polyacrylite Helmet

The Reigning King of Full-Face 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.

This helmet is designed and intended exclusively for use by bicycling activities, including mountain biking and off-road cycling.

- Mips® C2 Rotational Impact Brain Protection System

- Advanced Polyacrylite shell construction

- Front air intake system, with high flow through polymer center and power grid side mesh

- Collarbone Suspension System

- Breakaway visor screws

- Anti-microbial padding

- 1150G

- Quick release contoured 3D cheek pads for anatomically optimized fit