The S-Pack 1400 B is our most advanced sock battery to date. Thin and compact, it fits perfectly with all Therm-ic heated socks. 

- Fitted with Bluetooth© technology, you can now control all 10 heat settings via your smartphone, using the Thermic Heat Control App
- Includes 3 manually controllable heat settings via power button
- Keep your feet warm for up to 16 hours
- Includes a USB charger
- Wall charger not supplied