What Our Gearhead® Experts Are Saying:"I default to the Classic Hike Extra Cushion on any trip where I'm carrying a full pack over multiple days — the heavier cushion holds up well over long mileage and keeps hot spots from developing even in boots that have seen some wear. The merino blend stays fresh longer than a synthetic sock would, which makes a real difference by day three."Heavy mileage and a full pack demand more from a sock than most people give it credit for. Smartwool's Classic Hike Extra Cushion Crew Sock answers with a dense merino cushion that absorbs impact, resists hot spots, and stays comfortable across the kind of days that wear out lesser gear. The merino blend wicks moisture and manages odor naturally, so the sock stays fresh well into a multi-day trip. Crew height keeps debris and brush out of the boot, and a touch of elastane holds the fit in place mile after mile without bunching or slipping. It's the sock for long objectives and big days — the one that earns a permanent spot in the pack.