The robust three layer Gore Tex Pro fabric that makes up the Mammut Men's Alyeska GTX Pro 3L Bib Pant is ideal for waterproof protection while backcountry skiing and touring in nasty and unpredictable conditions. When you wear it for resort freeriding, well, mother nature can bring it on. An elastic insert at the back of the waistband allows plenty of room for bending over and moving around. When you're earning your turns or skiing in intense sunshine, side vents with splash proof zippers and mesh lining allow for plenty of ventilation. Mammut gave the Alyeska a plethora of pockets, specifically for your beacon, radio, and maps. The leg height can be easily adjusted for your comfort, and cuff gaiters keep out the snow. Pre shaped knees combine with a loose fit to give you the optimal range of motion you desire while out in the mountains.