The Millet Peuterey 35+10L Mountaineering Backpack is built for the kind of alpine days where the objective changes with the weather and the pack has to keep up. The two-buckle lid expansion adds 10 liters when the route demands a bivy layer or extra rope, and the ergonomic harness with load-lifter straps transfers weight to the hips on long approaches, keeping the load centered through steep terrain. Technical hardware rides outside the main body on the ski, rope, and FPP ice-axe carry systems, so the main compartment stays organized from trailhead to summit. What Our Gearhead(R) Experts Are Saying:"The direct-access crampon compartment earns its place on a technical route. I can pull crampons without unpacking the lid or digging through the main body when conditions change fast."