Whether it's a day of skiing, trekking or camping, the Tarne 36 by Gregory Mountain Products ($135)  is the only backpack you'll need to stash your gear.  It includes a large main compartment, complemented by a number of organizational pockets. The Tarn 36 is also built with compression straps to keep your belongings in check, as well as a waist belt, adjustable, padded shoulder straps and a molded foam backpanel for comfort.