My favorite pack for day-trip winter ascents is the Osprey Variant 37. This pack is jammed with features made for ice climbing and ski mountaineering! What makes it to my list, is the convenient front panel compression pocket where I stow my cramp-ons, and the ice tool carrying pockets located externally on the pack. The reinforced pocket protects my tool heads from the elements and also snagging on anything. The glove-friendly buckles and zips make for easy access to your belongings, even in the most adverse conditions. The pack also includes the ability to carry a rope and ski’s, as the cherry on top. Totally comfortable and all-around a solid pack for winter adventures.