When youre carrying a rope, sleeping bag, and gear for a mountaineering or backpacking trip, you want your pack to fit well. Thanks to a back and waist-belt system that adjusts and moves with you, the Lowe Alpine TFX Summit 65 Pack feels comfortable every step of the way. The TFX Summit Packs hipbelt and internal frame both rotate and flex with the motion of your hips and spine, without compromising stability. Compartments with zip-out dividers give you organizing options, while the lid detaches and converts into a beltpack for shorter hikes out of base camp. Lowe Alpine gave this expedition pack an extendable lid so you can pack an extra 900 cubic inches of clothes or food.