Mammut's Wall Rider helmet uses an EPP (expanded polypropylene) shell and a minimalist adjustment system to achieve the lightest weight possible. In addition to the cushioning properties of the EPP plastic, the helmet shell is reinforced with a hard shell to guarantee maximum safety. To help climbers keep a cool head, the Wall Rider is equipped with lots of vents. The fit and adjustment system ensure the helmet sits well on your head. * Main photo is Chill.