HomeStore

D4 Polyacrylite Helmet

D4 Polyacrylite Helmet

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.


  • Mips C2 system and advanced Polyacrylite shell for rotational impact protection
  • Front air intake with high-flow polymer center and power grid mesh for ventilation
  • Collarbone Suspension System and breakaway visor screws for added safety
  • Anti-microbial padding and quick-release 3D cheek pads for optimized anatomical fit
Select Color
Select Maximum Head Circumference
Select Size
From $105.00

Original: $299.99

-65%
D4 Polyacrylite Helmet

$299.99

$105.00
Product image 1
Product image 2
Product image 3
Product image 4
Product image 5
Product image 6
Product image 7
Product image 8
Product image 9
Product image 10
Product image 11
Product image 12
Product image 13
Product image 14
Product image 15
Product image 16
Product image 17
Product image 18
Product image 19
Product image 20

Description

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.


  • Mips C2 system and advanced Polyacrylite shell for rotational impact protection
  • Front air intake with high-flow polymer center and power grid mesh for ventilation
  • Collarbone Suspension System and breakaway visor screws for added safety
  • Anti-microbial padding and quick-release 3D cheek pads for optimized anatomical fit
D4 Polyacrylite Helmet | Sierra Bicycle Supply