Keep your feet warm when waiting is prolonged
At the post, the cold does not always come from a lack of equipment. It mainly sets in when you remain still for several hours. Toes gradually cool down, concentration decreases, and the day becomes harder to endure.
The Heat Sock 4.1 Toe Cap provides targeted warmth to the most exposed part of the foot. The heating system surrounds the toes from above and below, without unnecessarily heating the entire leg. You simply adjust the power according to the temperature, the duration of the outing, and your level of activity.
Keep your feet warm when waiting is prolonged
Targeted warmth around the toes
Merino SoftTec®: warmth and moisture management
This construction helps regulate moisture inside the shoe while maintaining a soft and comfortable material against the foot. It is suitable for both waiting periods and movement phases.
rcB 1200 Batteries: a setting suitable for the output
Each battery weighs 85 g and measures 8.5 × 5.5 × 1 cm. The USB charging cable with charge indicator is included.
A user-friendly product
1
Recharge the batteries
Connect the two rcB 1200 batteries with the included USB cable and wait for them to fully charge.
2
Attach the batteries
Connect each battery to the push buttons located at the top of the sock.
3
Select the heating level
Choose one of the three levels directly on the battery or use the Lenz Heat app for more precise adjustment.
4
Adjust according to the terrain
A product designed for long days in cold weather
Surrounding warmth
The Toe Cap® technology heats the toes from above and below.
Adjustable autonomy
The rcB 1200 batteries provide between 3.5 and 14 hours of operation, depending on the selected level.
Direct control or via app
The heating can be adjusted on the batteries or from a compatible smartphone.
Anatomical support
The left and right socks are knitted separately to better follow the shape of the foot.
Enhanced comfort
The sole, heel, and toe area benefit from padded reinforcements.
Simple maintenance
The socks are machine washable at 30 °C, after removing the batteries.
Pack contents
- 1 pair of heated socks Heat Sock 4.1 Toe Cap
- 2 rechargeable lithium batteries rcB 1200
- 1 USB charging cable
- 1 washing bag
- 2 contact protectors
- 3 pairs of colored elastic bands
- User manual and safety instructions
Battery life of rcB 1200
| Heating level | Announced autonomy |
|---|---|
| Level 1 | 10 to 14 h |
| Level 2 | 5.5 to 7.5 h |
| Level 3 | 3.5 to 4.5 h |
These durations are those announced by Lenz for the batteries rcB 1200. Actual autonomy may vary depending on the outside temperature, charge level, shoe insulation, and use of the application.
Size guide
| EU size | International size | UK size | US size |
|---|---|---|---|
| 31–34 | XS | 1–2 | 1–3 |
| 35–38 | S | 2.5–5 | 4–6 |
| 39–41 | M | 5.5–7 | 7–8 |
| 42–44 | L | 7.5–9.5 | 9–11 |
| 45–47 | XL | 10–11.5 | 12–13 |
Technical specifications
| Feature | Value |
|---|---|
| Brand | Lenz |
| Model | Heat Sock 4.1 Toe Cap |
| Battery pack | rcB 1200 |
| Type | Heated socks with batteries |
| Color | Green |
| Heating technology | Toe Cap® |
| Heated zone | Above and below the toes |
| Battery levels | 3 |
| Adjustment via app | Yes, Lenz Heat App |
| Connection | Bluetooth |
| Settings via app | 9 levels and timer |
| Maximum announced autonomy | Up to 14 h |
| Minimum announced autonomy | 3.5 h |
| Batteries included | 2 lithium batteries rcB 1200 |
| Battery attachment | Snap buttons |
| Weight of one battery | 85 g |
| Dimensions of one battery | 8.5 × 5.5 × 1 cm |
| Knitting | Ergonomic left/right |
| Support | Band on the instep |
| Reinforcements | Cushioned heel, toes, and sole |
| Care | Machine wash at 30 °C |
| Compatibility | Compatible Lenz Body Heat System batteries |
| Sizes | 31–34, 35–38, 39–41, 42–44, 45–47 |
Composition
| Material | Proportion |
|---|---|
| Polyester | 50 % |
| Polyamide | 33 % |
| Merino wool | 10 % |
| Elastane | 7 % |
Key Points
- Heat distributed above and below the toes
- Two rcB 1200 batteries included
- Up to 14 hours of autonomy
- Three heating levels on the batteries
- More precise adjustment with the Lenz Heat app
- Merino SoftTec® blend
- Anatomical fit left foot and right foot
- Machine wash at 30 °C
FAQ - Frequently Asked Questions
It depends on the chosen heating level. Lenz announces 10 to 14 hours at level 1, 5.5 to 7.5 hours at level 2 and 3.5 to 4.5 hours at level 3.
Three levels are accessible directly from the batteries. The Lenz Heat app allows you to choose from nine levels and use a timer.
Yes. The set includes two rechargeable rcB 1200 batteries, one for each sock.
No. The Toe Cap® technology targets the front of the foot and heats the toes from above and below.
Yes, at 30 °C, after removing the batteries. The washing bag is provided.
Yes. They can be worn like regular technical socks, even when the batteries are off or removed.
The manufacturer offers sizes 31–34, 35–38, 39–41, 42–44 and 45–47.
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