Shoulder season in Colorado is an all-around climber’s dream—and this might just be the ultimate all-arounder pack. Whether targeting remote trad lines at Lumpy Ridge on crisp fall days, early-season water ice, or wintercondition alpine in Rocky Mountain National Park, the ProLighter handled every load well and was comfortable and stable to carry. “A rack, helmet, layers, food, and rope easily disappear in this pack,” said one tester. “Plus, the pack can expand another 10 liters and has an external rope attachment so you could do fast and light multiday objectives, too.” A reinforced nylon sleeve and Fastex buckles quickly accept ice axes, while the same ultra-thick nylon protects the front of the pack from sharps (and shows barely a scratch after months of use). Two shoestring-thin “ErgoFlex” rods form an X inside the pack to provide structure and transfer weight directly to hips. Bonus: It weighs just 2 lbs., 13 oz.