Heating area:

Heats the back, waist, and knees.
With the far-infrared fiber heating element layer, start heating within 30 seconds, long duration, and a long heating time. Promotes blood circulation, very suitable for people who are afraid of cold, Raynaud's, arthritis, poor circulation, and stiff joints.

Material:

Soft, breathable cotton and polyester fabric with cotton lining and strong elastic reinforcement. Quick drying; no shock even when wet.

Outdoor Activities:

Great for a variety of outdoor activities such as jogging, walking the dog, outdoor work, hunting, skiing, fishing, hiking, biking, motorcycling, and snow shoveling.

To Extend the Heating Time:

Powered by 2 extra-large capacity 7.4v3000mAh rechargeable lithium battery packs, lasts 2-5 hours before recharging, depending on the setting (low, medium, high).

How to Use :

Charging – Fully charge the supplied charger kit before use.
Plug-in - Connect the battery to the plug located in the pocket.
On - Press and hold the switch button for three seconds
The initial temperature is 55-65 degrees (red LED)
The middle temperature is 45-55 degrees (blue LED)
The minimum temperature is 35-45 degrees (green LED)

Wash and Care:

Machine washable. When cleaning, please take out the battery.
If machine washing, put the garment in a laundry bag to wash.
In order to ensure the service life of the clothes, try to avoid strong washing and dry them normally.

Package contains:

A set of electric thermal underwear set
Two 7.4V 3000mAh lithium battery packs
a charger
manual.