The Crag Sender is one of Mammut's lighter helmets for climbing, and this Crag Sender MIPS Helmet adds a Multi-directional Impact Protection System for an even greater level of safety. MIPS is a low-friction, slip-plane layer that rotates independently around your head to drastically reduce impacts off angled crashes, like smacking the side of your head on the wall after long falls. The Crag Sender utilizes a hard shell for lightness and reliable durability, and EPS foam adds impact protection. You can adjust the fit with a dial that's easy to use even while climbing, and there's an adjustable chin strap and additional cushioning to ensure a snug fit.