I’ll do anything to climb sans pack, but I’ve always found harness-clipping approach shoes and water bottle a clumsy solution. The problem-solvers in France have found a savvy answer with their PETZL BUG ($60, en.petzl.com), a sturdy, abrasion-resistant, 18L rucksack that weighs only 20.1oz. This multi-pitch-specific pack is just large enough for approaches if you go light, but also fits well in a full-sized pack, to pull out later. The BUG is hydration compatible and features side compression straps, an internal, zippered mini-pocket, one daisy chain, and even a rope carrier. On route, the BUG rode nicely above my harness and offered both balance and performance, thanks to its highly flexible frame and sculpted shoulder straps. Plus, the pack’s tapered, sleek profile prevented hang-ups in chimneys and other tight, squirmy places.