The Bluetooth enabled batteries* to power your heated socks! The S-Pack 700 lasts for up to 8 hours and comes with a USB charger cable. Have a long trip planned? Grab a set of these as your back up batts to make sure you're toes never know they are in a cold ski boot.

Compatible with:

Therm-ic Heat Fushion Heated Socks

Sidas Ski Heat LV Heated Socks

*Heated socks sold seperately.