The Mammut Men's Alyeska GTX Pro 3L Jacket handles bluebird days in the backcountry and snowy days at the resort. Its 3 layer Gore Tex Pro membrane works with the fully taped seams to provide exceptional waterproofing, and it's proven to ensure higher levels of breathability for the backcountry skiers. Mammut added underarm vents with 2 way zippers for customized airflow, and the removable powder skirt attaches to compatible ski pants for complete coverage. The hood adjusts in three ways for a better fit, and it slides over helmets with ease. The Alyeska also features internal hand gaiters with thumbholes, hook and loop cuffs, and multiple backpack compatible pockets for skins and electronics.