How long does the battery last?

Runtime depends on the heat level. Expect the longest run on the lowest setting and the shortest on high, with the app showing remaining charge. The socks switch to a low-heat mode automatically below 30% battery to stretch the last of the charge.

Can I control each sock separately?

Yes. The app adjusts the left and right sock independently, so you can run one foot warmer than the other. Each side also has its own three heat levels.

Do I need the app to use them?

The app gives you the full feature set: per-sock control, timer and battery readout. Without it you lose that fine control, so plan to keep a charged phone with you on cold days.

Are they good for skiing?

They are built for it. The three zones cover toes, forefoot sole and instep, which are the spots that get coldest in ski boots, and the wool blend adds insulation. Check that the battery pack fits your boot without pressure points.

Treat them as wool-blend socks: remove the battery packs first, then wash gently and air dry. Heat and tumble drying can damage the heating elements and the wool.

You get the pair of heated socks and their rechargeable battery packs. A charging cable is typically included; check the pack contents for the exact accessories.