What is the best insulated underwear for keeping you warm? Well, first we must understand how Thermal underwear works, then we can look for those fabrics that have the best characteristics we are looking for in our base layer.

To begin, insulated underwear is not designed to keep you warm, but rather to keep you from getting cold by wicking away moisture. With electric thermal underwear you get the best of both worlds, wicking away moisture and heating elements for better warmth.

So you want a fabric (base layer) that fits tight to the skin, making as much contact as possible. Next this fabric needs to be hydrophilic, absorbing sweat quickly and hydrophobic, dry as fast as possible.

Best Fabric:

Cotton – not what you want here, it absorbs sweat well, but dries why to slow.
Polypropylene – absorbs sweat well, but retains body odor and will smell within hours.
Polyester – absorbs sweat well, dries fast, great mobility, will develop odor over time.
Merino wool – hydrophilic, dries faster than Cotton, natural antibacterial properties, so no odors over time. This is definitely the best Fabric on the Market for Thermal Underwear (Base Layers).

*Recommendation, when you are enjoying the Outdoors do not cut corners by buying something you will not be happy with. Spend a few more dollars and get the best. Below is the Best Electric Thermal underwear for 2024!

2024’s Best Thermal Underwear for Men.

2024’s Best Thermal Underwear for Women.

‎HYIFAC Women 16-Zones Electric Thermal Heated Underwear

USB Electric Heated Clothing Three-Speed Temperature Control Set for Winter

The HYIFAC 16 pad Heated underwear is designed to keep your core body areas warm in cold weather. Built with quality carbon fiber heat elements and 3 heating levels to generate consistent heat helping to maintain body warmth. Great for keeping you warm for activities such as snowmobiling, camping, hiking, skiing, Hunting and much more.


3 heating levels
Mobile Power Bank
16pcs heating pads
5V portable charger USB
Quality carbon fiber heating elements

‎HYIFAC Men 16-Zones Electric Thermal Heated Underwear

USB Electric Heated Clothing Three-Speed Temperature Control Set for Winter

The HYIFAC 16 pad Heated underwear is designed to keep your core body areas warm in cold weather. Built with quality carbon fiber heat elements and 3 heating levels to generate consistent heat helping to maintain body warmth. Great for keeping you warm for activities such as snowmobiling, camping, hiking, skiing, Hunting and much more.

*Slim fit thermal underwear implants with heated physiotherapy micro-carbon fiber, made of soft skin-friendly material to ensure a warm and comfortable touch.


8 Heating Zones for Tops
8 Heating Zones for Pants
Slim fit thermal underwear
5V/2A USB portable charger
Soft skin-friendly material
Heated physiotherapy micro-carbon fiber
Three-level Temperature Adjustment; Green 42°C, Blue 48°C, Red 55°C

‎Men Heated Thermal Underwear Set

Soft Fleece Lined USB Electric Heating Thermal Base Layer Long Johns Suit

The LANGWEI Heated Thermal Underwear has 13 heating areas and intelligent temperature control. The heating zones include; shoulders, back, waist, elbows, abdomen, hips, legs and knees. Designed with a thermal protection module for safety, helps with blood circulation, enhance metabolism, Raynaud’s disease, arthritis and stiff joints.


USB interface
*No Power Bank
5V safety voltage
100% Polyurethane
Machine washable/hand wash
22 carbon fiber heating zones
Intelligent temperature control
Built-in thermal protection module

Insulated Heating Underwear For Women

Washable USB Electric Heated Thermal Long Sleeve T Shirts with Pants Battery not Include

The LvBo electric heated thermal underwear is designed with High-elastic cashmere fabric and is machine washable. There are three modes of temperature adjustments that provide a heating range from 38-50 degree.


Pull On closure
Machine Washable
Built in power interface
High-elastic cashmere fabric
Three modes of temperature adjustment from 38-50 degree

Women & Men’s Electric Thermal Underwear Set

USB Electric Thermal Heated Long Johns Set with 20000 MAh*2 Rechargeable Battery

The Vuirrm heated thermal underwear is not only great for keeping you warm and providing protection from cold wind, but also relieves cold discomfort in your legs, waist and knees. Comes with 20000mAh*2 power bank to keep working all day long!


100% Cotton
Zipper closure
Machine Washable
Two 20000mAh power banks
5V portable charger USB plug
11 carbon fiber heating elements
Three stage smart thermostat; Red 65°C, Blue 45°C and Green temperature can be set as desired