How long does the heat last?

Therm-ic rates the S-Pack 1400B batteries for up to 16 hours, which is on the lowest heat setting. Expect shorter runtimes on the higher settings.

Can I control it from my phone?

Yes. The batteries are Bluetooth compatible and pair with the Therm-ic app, so you can change heat levels without digging under your layers.

One pair of Heat Fusion Uni socks, two S-Pack 1400B batteries and a USB charging cable. You need to supply your own USB power adapter.

Are these socks unisex?

Yes, they are sold as a unisex model. Fit follows the sock size you pick, so choose the size that matches your shoe size.

The socks can be washed, but the wiring means you should follow Therm-ic's care instructions and remove the batteries first.

How do the batteries attach?

The batteries snap onto the sock, so you can click them on at the start of the day and take them off for charging.

What do buyers say about the Therm-ic Powersock Set Heat Fusion Uni S-Pack 1400B?

Rated 4.2 out of 5 from 40 ratings.

Where can I buy the Therm-ic Powersock Set Heat Fusion Uni S-Pack 1400B?

9 stores we checked sell it, including Alpenglow Sports, Utah SKI Gear, Cripple Creek Backcountry, RunUnited, Powder7 Ski Shop.

Therm-ic Powersock Set Heat Fusion Uni S-Pack 1400B

Q: Where is the Therm-ic Powersock Set Heat Fusion Uni S-Pack 1400B cheapest?

At Walmart, for $329.95, 18% under what the other stores charge, as of our latest check.

Best price now

$329.95at WalmartChecked Nov 4

18% under what the other stores charge

Compared across 9 stores. Prices are checked against each store and labelled with when.

Visit Walmart

What reviewers say

4.2 / 540 ratings

Rated 4.2 out of 5 across 40 ratings. Owners like the all-around toe warmth and the long battery life; the main gripes are the missing USB adapter and the bulk of the batteries.

What people mention

WarmthPraisedOwners say the heat reaches the toes evenly rather than one hot spot.
Battery lifePraisedReviewers report the batteries lasting a full ski day on lower settings.
App controlPraisedBluetooth control from a phone is called convenient on the slopes.
BulkCriticisedThe battery packs are described as noticeable at the cuff.
Charging kitCriticisedBuyers note the USB power supply is not included.
CareMixedWashing around the wiring takes extra care, owners say.

About the Therm-ic Powersock Set Heat Fusion Uni S-Pack 1400B

These unisex heated ski socks use Heat Fusion technology to warm the feet all around, including the toes. The set comes with two S-Pack 1400B batteries, which give up to 16 hours of heat. The batteries attach quickly with snaps.

The socks have a breathable micro-channel construction that wicks away moisture. They are made from a blend of natural and synthetic fibers. The shin, calf and instep areas are built for comfort, and the heel and toe are reinforced. The fit is tight.

The batteries are Bluetooth compatible, so you can control the heat from your smartphone. A USB charging cable is included.

Material

49% acrylic, 27% polyamide, 10% merino wool, 12% polypropylene, 2% elastane

Fit

Tight fit

Sizes

35-38, 39-41, 42-44, 45-47

Battery life

Up to 16 hours of heat

Control

Bluetooth, from a smartphone

Reinforcement