Troy Lee Designs D4 Composite Downhill Helmet. The TROY LEE DESIGNS D4 Composite Downhill Helmet in Sram Red / Black is a top-of-the-line helmet designed for extreme downhill mountain biking. This helmet is constructed with a durable composite shell that provides maximum protection while keeping the weight low for enhanced comfort. The bold Sram Red and Black color scheme adds a stylish touch to this high-performance helmet.Equipped with innovative features such as MIPS technology for added impact protection and a removable, washable liner for easy cleaning, the TROY LEE DESIGNS D4 ensures a secure and comfortable fit every time you hit the trails. The ventilation system on this helmet helps keep you cool during intense rides, while the adjustable visor allows you to customize your level of sun protection.Whether you're tearing down a rugged trail or hitting the bike park, the TROY LEE DESIGNS D4 Composite Downhill Helmet is the perfect choice for serious riders looking for ultimate protection and style. With its sleek design and advanced safety features, this helmet will give you the confidence to push your limits and conquer any terrain with ease. tradeinn Bikeinn