Description of K2 Edge Helmet The Edge offers lightweight performance at a minimal price. As with all K2 helmets, the edge meets all the highest test standards for ski and snowboard helmets with a clean look at a minimal weight. Features: Construction: In-Mold Certification: ASTM F2040 – (prEN1077 for Europe) Passive Ventilation K2dialed Fit System Baseline Audio System Included Washable Head Liner Removable Ear Liners with Audio Pocket