Sweet Protection's lightest, most packable helmet to date, the Ascender MIPS Helmet is specifically designed for ski mountaineering-with plenty of features for the climb and the descent. This low-profile helmet doesn't sacrifice performance for weight. Instead it uses Advanced Hybrid Variable Elasticity shell technology to transfer the impact in critical zones, while dual-density EPS foam optimizes impact performance specifically for the area and MIPS technology reduces the rotational force transferred to your head in a crash. The Ascender is triple-certified and weighs in at under a pound.