The D4 Polyacrylite delivers professional-grade protection without the premium price tag. Built with Mips® C2 brain protection technology, this full-face helmet combines the same safety standards as carbon and composite models in a durable polyacrylite shell. An integrated air intake system keeps you cool during intense rides, while the anatomical fit ensures comfort and stability on every descent. Purpose-built for mountain biking, the D4 sets the standard for full-face performance and reliability.