It wasn't easy to improve upon the class-leading design and function of Troy Lee Designs’ D3 helmet, but they made it happen. Built with an aerospace shell design and materials, TLD was able to get the D4 Composite Qualifier helmet to 1,050 grams without sacrificing any strength. MIPS C2 protection system is used to add an additional layer of safety in the event of a fall. For comfort, the D4 Comp routes cooling air through a front air intake system that flows through the polymer center and power grid side mesh to keep your head cooler during the ride. And, TLD's X-static and XT2 antimicrobial, odor-fighting padding keeps the inside of the helmet a much nicer place to be. Full-face carbon helmet intended for bicycle activities and not motorized vehicles EPS and updated head form shape for improved impact performance Full incremental sizing for greater fit range Strategically placed interior chin bar shock pads for comfort and durability Quick-release and contoured 3D cheek pads for emergency helmet removal Purpose-built internal cavities for audio integration 20 high-flow intake and exhaust ports for maximum ventilation Stainless steel chinstrap D-rings are light and strong Summer 2023 model Equipped With Multi-directional Impact Protection System (MIPS) MIPS Brain Protection System is a helmet-integrated, low-friction layer designed to reduce rotational motion transferred to the brain from angled impacts to the head. Illustrations explaining BPS from MIPS Brain Protection System on Vimeo .