troy lee designs d4 polyacrylite mips helm linear Choose your size:XS seamless finger finishes

seamless finger finishes

comfort and safety

450 ml bottle volume

13 large ventilation channels

troy lee designs d4 polyacrylite mips helm linear Choose your size:XS seamless finger finishesTroy Lee Designs D4 Polyacrylite MIPS Helmet Linear The reigning king of full face helmets expands the D4 lineup with a polyacrylite model that packs the same safety and comfort features of its premium carbon and composite models into a budget friendly shell. Its features make the D4 the most desirable full face helmet in mountain biking, including Mips C2 brain protection, an air intake system for ventilation, and an unmatched anatomical fit. Mips C2