Troy Lee Designs D4 Polyacrylite Full Faced MIPS Bike Helmet

Regular price $299.99
Shipping calculated at checkout.

Only 1 items in stock!

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

5 Star Reviews

Our order was processed promptly and arrived earlier than promised and in excellent condition. I would not hesitate to order from this vendor again.


Great helmet, and even greater service by these folks @ Alpine East. order arrived a week earlier than expected and they even included a hand written thank you note. they have a new client going forward. thanks guys.