Is the S-Pack 1400 BT worth it over cheaper heated socks?

If you ski or work outside in real cold, the two included batteries and app control justify part of the premium. Cheaper kits usually have one battery pair, fewer heat levels and no Bluetooth.

How long do the batteries actually last?

Therm-ic rates up to 16 hours on the lowest level, about 8 hours on level 2 and about 5 hours on level 3. Cold weather and a full charge matter; carry the spare pair for long days.

Can I control each sock separately?

Yes. The app lets you set heat levels per foot and save up to 4 user profiles. You can also change levels with the buttons on the batteries.

What sizes do the socks come in?

The Ultra Warm Performance socks come in unisex XS to XL. Check Therm-ic's size chart against your shoe size, since the socks are thicker than normal ski socks.

Two S-PACK 1400B batteries, a Bluetooth receiver, a USB charger and a pair of Ultra Warm Performance socks. You supply the USB power source.

Heated sock kits usually drop in spring and early summer, and around Black Friday. At $299.95 as of November 4, 2026, the current price is near the top of its range.

Where can I buy the Therm-ic S-Pack 1400 BT with Ultra Warm Performance Socks?

4 stores we checked sell it, including Backcountry.com, Larry's Boot Fitting, eBay, Amazon.

Therm-ic S-Pack 1400 BT with Ultra Warm Performance Socks

Q: Where is the Therm-ic S-Pack 1400 BT with Ultra Warm Performance Socks cheapest?

At Backcountry.com, for $299.95, as of our latest check.

Best price now

$299.95at Backcountry.comObserved at 11:46 AM

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Our take on the Therm-ic S-Pack 1400 BT with Ultra Warm Performance Socks

The Therm-ic S-Pack 1400 BT is a heated sock kit: two 1400 mAh batteries, a Bluetooth receiver, and a pair of Ultra Warm Performance socks, controlled from a phone app or the battery buttons. It offers three heat levels, with up to 16 hours on the lowest setting and about 5 hours on high. The kit suits skiers, riders and winter workers who want warm feet without fiddling with batteries under layers. At $299.95 at Backcountry.com as of November 4, 2026, it sits at the top of its recent price range, so it is a full-price buy rather than a bargain.