If a long summit bid or a multi-week traverse is in your plans, this cavernous pack will schlep everything you'll need. Ascent-friendly features (load-stabilizing straps, gear loops) are well matched with ski-specific tweaks (snug fit, side ski straps, helmet recess). Basically it's a mountaineering pack that doesn't discriminate against skiers. Gripes: With so much room, you'll be tempted to overpack. Props: Rubber-reinforced side-carrying straps fit wide skis.