Heated socks THIN – HeatPerformance®

The THIN are a thin, low-cut model with 5W heating power per sock for everyday use in low or regular shoes. The ULTRA THIN also have 5W per sock, but they are our thinnest model and are mainly designed for shoes where you want as little extra volume as possible. The ACTIVE THIN are higher, more focused on active outdoor use, have a remote control and provide 6W heating power per sock.

THIN and ULTRA THIN both have 5W heating power per sock. In practice, the THIN often feel slightly fuller and can retain warmth a little longer because the sock is slightly thicker than the ULTRA THIN. ULTRA THIN are mainly intended for shoes where every millimetre of space matters.

The THIN heated socks are suitable for everyday use in low or regular shoes, as long as there is enough room around the toes and foot. Think of use at home, at the office, during a walk or on cold days outdoors. For high walking boots, boots or ski boots, ACTIVE THIN, PRO or POWER are usually the better choice. For very tight shoes, cycling shoes or smart shoes with little room, ULTRA THIN are often more suitable.

No, usually not. The THIN are a low-cut model where the battery sits above the ankle. In boots, ski boots or other high shoes, the battery or battery holder may press against the shoe. For high shoes, choose ACTIVE THIN, PRO or POWER instead.

The extra-thin carbon heating elements are located around the toes and forefoot, exactly where cold is often felt first. They are carefully integrated behind a comfortable inner finish, so you experience as little extra volume around the toes as possible.

We deliberately choose not to heat the entire sole of the foot. This would require more energy from the battery, often make the sock thicker and could be felt more quickly under the heel when walking or working. By focusing the warmth on the toes and forefoot, the sock remains more comfortable, thinner and more durable.

With the HeatPerformance® THIN socks, you will feel warmth around the toes within about 30 seconds. Use the highest setting to warm up cold feet quickly, then switch back to the middle or lowest setting to keep the warmth for longer. The exact heat sensation can vary depending on the person, heat setting, shoe and outside temperature.

No, the HeatPerformance® THIN heated socks do not have a remote control. You adjust the heat setting using the button on the sock.

With the included 7.4V / 2600 mAh batteries, the realistic runtime is approximately 7–8 hours on the lowest setting, 4–6 hours on the middle setting and 2.5–3.5 hours on the highest setting. The exact runtime depends on the selected setting, the outside temperature, the insulation of your shoes and the condition of the batteries.

With heated socks, the number of mAh does not tell the whole story about warmth. Many regular power banks work as standard at 5V, while the HeatPerformance® THIN use a 7.4V heating system with 5W per sock. The actual heating power in watts is more important than battery capacity in mAh alone.

A simple calculation shows this clearly. The THIN deliver approximately 5W of heating power per sock at 7.4V. If the same heating element were used at 5V, the power would drop significantly. With the same resistance, the rule is: power = voltage × voltage ÷ resistance.

Example:

• At 7.4V, the system delivers approximately 5W.
• At 5V with the same heating element, this would be only about 2.3W.

This means that a 5V power bank with a high mAh rating may look impressive on paper, but it does not automatically provide more warmth. A power bank can mainly supply power for longer; the heating system determines how much warmth is actually produced.

That is why we use compact, rechargeable 7.4V lithium-ion batteries. These are better suited to a thin heated sock that needs to remain comfortable in low or regular shoes, without depending on a large power bank attached to your leg.

Yes, with optional extension cables for heated socks you can carry the batteries, for example, in your trouser pocket. This can be more comfortable if you want less bulk around your lower leg or if you wear the sock under tighter clothing.

Warm feet can be pleasant if you quickly get cold feet, suffer from chilblains or are sensitive to cold, for example due to Raynaud’s syndrome. The HeatPerformance® THIN heated socks are designed as a warming product and are not a medical device. In case of medical complaints, diabetes, reduced sensitivity or persistent pain, always consult your doctor.

Yes, the heated socks can be washed at a maximum of 30°C. Always remove the batteries before washing the socks. Preferably use a laundry bag and choose a gentle wash programme. Do not use a tumble dryer, bleach or aggressive detergent. Allow the socks to air-dry completely and only reconnect the batteries once the socks and connectors are fully dry.