Osmo Heated Socks 2.0

The battery life is solid—I’ve worn them for a full winter hike and they stayed warm the entire time. The heat settings are easy to adjust mid-walk, and the fabric stays comfortable against my skin all day.

Was worried these would feel bulky, but the battery pack is so slim I barely notice it while walking the dog in 20-degree weather. The heating coils warm up evenly from toe to ankle, which makes a huge difference on those really cold mornings.

The battery pack sits flat against my ankle so I forget it's even there, and I got a solid five hours on the medium setting before it died. My toes actually stayed warm through a two-hour football game in the freezing bleachers, which never happens with my old wool socks.