At the recent Outdoor Retailer Show winter sports gear maker K2 showed it was headed in the right direction with the Route, which it claimed was “the lightest snow-certified helmet” ever made. It weighs just 320 grams and features 59 vent holes, ear warmers and boa closure to provide a tight fit. The company noted this is actually a multi-sport helmet that could be used for mountain biking as well as snowsports, but either way it provides plenty of airflow to help keep the head cool.