Impact Racing 18700420 Helmet - P3 Crew, Med . The Impact P3 by Troy Lee Designs is the ultimate pit crew helmet and the pinnacle of style and safety with its ultra-lightweight UNI carbon shell and featherweight titanium hardware. Featuring a dual density shock pad system and adjustable height visor, the Impact P3 by TLD also offers high-flow intake and exhaust ports and deeper EPS channeling to provide optimal ventilation. The removable cheek pads are washable and replaceable and feature TLD’s exclusive MX-style comfort liner. The P3 helmet easily fastens and unfastens with the included quick-clip chin closure. Adult Sizes: XS-S/M-L/XL-XL