Much like its Composite counterpart, the Troy Lee Designs D4 Polyacrylite Helmet strikes an excellent balance between lightness and strength. It retains the full coverage fit and comfortable feel of the D4 Composite also, but the D4 Poly remains just a slight bit heavier than its brethren. It’s durable, defensive, comfortable, and distinctively stylish with a classic TLD finish that mirrors the mentality and performance of the brand. A MIPS protection system works from the inside-out to protect the brain from rotational forces and sudden impacts mid-ride. A durable Polyacrylite outer shell continues this work from the outside-in, creating a nearly impenetrable layer between your head and your skin. It’s the perfect companion for technical trails, long afternoon rides, and downhill races, and it feels light, cool, and comfortable while doing so. Copious ventilation channels and a padded interior liner work in tandem to soften the load, making Troy Lee Designs’ D4 Polacrylite Helmet one of the most wearable additions to your kit.