Troy Lee Designs Downhill D4 Composite Helmet for MTB Racing - Adult Unisex

The class-leading design and function of our D3 helmet were not easy to improve upon, but we made it happen. Built with an aerospace shell design and materials, we were able to get the D4 Composite helmet to 1050 grams without sacrificing any strength. Always Evolving.

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, keeping your head cooler during the ride. The MIPS C2 system is used to add an additional layer of coverage. X-static and XT2 padding keep the inside of the helmet a much nicer place to be.

Not intended for use with motorized vehicles, the D4 Composite helmet boasts an aerospace-grade composite shell material and a claimed weight of 2lb 5oz (1050g) for a medium size. Backed by a 3-year manufacturer warranty, this helmet features 10 front intake ports, 5 overhead intake vents, and 7 rear exhaust ports to provide exceptional ventilation. The fit is adjustable with D-Ring fasteners.

This helmet's innovative design and engineering showcase our commitment to continuous improvement. By leveraging aerospace-inspired materials and construction techniques, we have elevated the performance and comfort of the D4 Composite to new heights, without compromising on weight or strength.

The result is a helmet that not only looks and feels premium but also provides the advanced protection and cooling required for the most demanding rides. Whether you're tackling technical trails or pushing the pace on the open road, the D4 Composite is engineered to keep you comfortable and secure, mile after mile.

product information: