Heated socks
For skiers who want additional warmth directly at the foot in cold conditions.
Therm-ic · Heated products for winter sports
Therm-ic at SF Sports – heated socks, batteries & boot dryers
Therm-ic develops products focused on warmth and drying for winter sports. At SF Sports we concentrate on three practical areas: heated ski socks, matching S-Pack batteries and compact solutions for drying ski boots.
Heated socksS-Pack batteriesBoot dryersWinter-sport accessories
Three product groups, one clear purpose
Warmth inside the ski boot, reliable power and dry liners. This makes the Therm-ic range easy to choose according to your actual need.
Batteries
For compatible Therm-ic heated socks and as replacement or second battery.
Boot dryers
For drying liners after skiing, training or race weekends.
THERM-IC AT SF SPORTS
Warm feet. A carefully chosen system.
Discover Therm-ic heated socks, compatible S-Pack batteries and accessories for drying your ski boots. SF Sports helps you choose the right set for ski days, training and long hours on the mountain.
Heated ski socksS-Pack 1400BBoot drying
Important before buying
Ultra Warm Comfort S.E.T® heated socks are sold without batteries. The S-Pack 1400B is a compatible battery set available separately. If you already own batteries, check the exact sock model before ordering.
Choose Therm-ic at SF Sports
Heated socksUltra Warm Comfort S.E.T® · unisex · without batteriesView heated socks
Compatible batteriesS-Pack 1400B · set of two batteries · BluetoothView battery set
Boot dryersTherm-ic Refresher · for damp ski bootsView boot dryer
Sizes, prices and availability are listed on each product page.
Combine heated socks and batteries
The thin S.E.T® heating line warms the toe area. Therm-ic explicitly lists the S-Pack 1400B as compatible with the Ultra Warm Comfort S.E.T®. Three heat settings and app control help you match warmth and battery life to your ski day.
According to the manufacturer, the S-Pack 1400B runs for up to 16 hours on the lowest setting. Actual duration depends on the selected setting.
Consider warmth and fit together
A heated sock cannot replace a properly fitting ski boot. For cold feet, we look at the sock, forefoot space, pressure points and boot fit. Bring the socks you actually intend to ski in to your bootfitting appointment.
Bootfitting at SF SportsFrequently asked questions about Therm-ic
Are batteries included with Ultra Warm Comfort S.E.T® heated socks?
No. The socks are sold without batteries. You can order the S-Pack 1400B separately from SF Sports.
Is the S-Pack 1400B compatible with these heated socks?
Yes. Therm-ic lists Ultra Warm Comfort S.E.T® as compatible with the S-Pack 1400B. For other sock models, please check their specific compatibility.
How long do the batteries last?
Therm-ic specifies up to 16 hours for the S-Pack 1400B on heat setting 1, up to 8 hours on setting 2 and up to 5 hours on setting 3.
Can bootfitting help with cold feet?
If the ski boot puts pressure on your foot, a fit check is worthwhile. We assess the sock and boot together and discuss which adjustments make sense for your feet.
Therm-ic buying advice
Which Therm-ic solution matches your use?
Below the products, the focus is no longer the brand itself but the actual buying decision. The key question is which problem you want to solve.
Feet get cold quickly
Heated ski socks are the first category to consider. The sock still needs to match the available volume in the ski boot.
You already own compatible heated socks
Battery compatibility becomes the key issue. Model and connector system should be checked before purchase.
Ski boots stay damp after use
A boot dryer is more useful than adding more heat while skiing.
When bootfitting matters more than extra heat
If your feet go numb, develop pressure points or the boot feels very tight, poor fit can restrict circulation. In that case, the boot should be checked instead of simply increasing heat output.
Are Therm-ic heated socks suitable for tight ski boots?
It depends on sock thickness and available volume. Race and low-volume boots should be checked individually.
Do Therm-ic heated socks need a separate battery?
Many models are sold without a battery, so the exact package contents should be checked.
How do I find the right Therm-ic battery?
Battery and heated-sock system must be compatible. Model name and model year help identify the right setup.
Can I use a second battery for long ski days?
Yes, provided the battery matches the Therm-ic system. A spare battery can be useful for long sessions.
When is a boot dryer useful?
Especially on multi-day trips, during training, while travelling or whenever liners remain damp after skiing.
What matters more: a warm sock or good fit?
Good fit is the foundation. Too much material inside the boot can create pressure and restrict circulation.
Can SF Sports check compatibility?
Yes. With the exact sock or battery model we can check whether the components match.