Named after the number of vents, the project.21 Combines massive airflow with the coverage demanded by increasingly technical bike parks, all-mountain and enduro trails. This airflow gives a cooling effect to keep you comfortable whilst concentrating on the trail ahead.Like its full-face sibling, the project.21 Uses energy reduction technology ert . This patented 4mm layer of lightweight polymer material dissipates both linear and rotational impact energy. Unlike other systems, ert responds instantly even at low-impact levels commonly seen in riding.In the helmet foam, there is additional hidden protection: conehead technology acts as a crumple zone, dissipating energy laterally. The dual-material, dual-density foam reduces the likelihood or severity of concussion. The project.21 Also uses our crv crash release visor system to make sure rotational forces are reduced on impact.That's a lot of protection technologies in one helmet as we wanted it to be the best open-face helmet in our range and to inspire rider confidence when worn out on the trails.The project.21 Comes with two pad kits to customise your fit, with agion anti-microbial fabric keeping them fresh. The 7idp rear dial adjuster allows incremental tuning on the fly and fidlock magnetic closure makes the buckle a breeze, even with thick winter gloves and when you get home enjoy the limited edition padded helmet bag to keep it in the manner such a trick helmet deserves the project.21 Is the culmination of so much t...