The Skull Dura X SPIN introduces Race Lock, an innovative new system that lets racers lock the helmet tightly to their head to prevent helmet shake at very high speeds. The turnwheel adjuster sits in line with the helmet shell and does not interfere with a race position. Developed according to the POC whole helmet Concept, the helmet features a multi-impact EPP core and a highly durable ABS/PC outer shell, as well as patent-pending SPIN technology. A Fidlock® buckle on the chin strap can easily be operated with gloves on. Ear pads can be removed in an emergency, making it easier for medics to remove the helmet safely if an injury has been sustained.