Troy Lee Designs D4 Polyacrylite

The Polyacrylite version uses a durable, slightly heavier shell material compared to the carbon fiber model. While it carries a bit more weight, it offers the same race-proven safety features and ventilation design at a more accessible price point.

The Mips C2 system is a low-friction layer inside the helmet that allows for 10-15mm of omni-directional movement. This helps reduce rotational forces transmitted to your brain during an angled impact, which is a common cause of concussion in mountain biking.

While the D4 is optimized for downhill, BMX, and gravity riding, its ventilation system is quite effective. However, because it is a full-face helmet, it will be significantly warmer and heavier than a standard open-face trail helmet, making it less ideal for long, pedally cross-country rides.

Yes, the helmet features quick-release 3D cheek pads designed specifically for emergency responders. They can be pulled out easily to help remove the helmet safely without putting unnecessary strain on the rider's neck.

Absolutely. The interior liner is removable and uses anti-microbial materials to help manage odor and sweat. We recommend hand-washing the pads with mild soap and air-drying them to maintain their shape and hygiene.

The visor is designed with breakaway screws to snap off during a significant impact. This prevents the visor from snagging on the ground or a tree, which helps minimize the rotational force transferred to your head and neck during a crash.