Seven iDP Project 23 Carbon Race Helmet - Cool Grey /Raw CarbonThe Project 23 Carbon Full Face Helmet features a whole host of materials and technologies to ensure your head gets the finest protection possible while offering an incredibly low weight for a hard shell lid. Seven iDP chose a Carbon Fibre hardshell construction over the EPS foam core rather than in moulding a light outer to a foam core, as can be found on most trail helmets. This makes it superb at absorbing impacts, prevents penetration from ground