Flexcore men's heated base layer shirt, with the heat zone on the chest highlighted.

Flexcore men's heated base layer shirt, with the heat zones on the upper back and the back of the neck highlighted.

Product packaging for the flexcore men's heated base layer shirt.

Man wearing the flexcore men's heated base layer shirt in the snow, front view.

Flexcore men's heated base layer shirt, front view.

Flexcore men's heated base layer shirt, back view.

FlexCore Men’s Heated Base Layer Shirt - Dual Control

Take control of your core temperature with this high-performance base layer. Dual-zone technology lets you heat your front and back independently for customized warmth that moves with you. It’s the ultimate foundation for any cold-weather pursuit.

$280.00

Item is in stock

ColorOnyx

Onyx

Size

Size chart

S

S M L XL 2XL 3XL 4XL

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Double your runtime with an extra battery

Additional/Replacement Ultra-Compact 10,000 mAh 5V power bank (KE002)

$69.00

Free 30 Days Returns

Free shipping on orders over $75

1 year warranty

Your Order Donates Meals

2 meals donated to a foodbank with every purchase

FlexCore Men’s Heated Base Layer Shirt - Dual Control

$280.00

Why You'll Love This

Multi-Zone Heating

Strategically placed heating elements across core body areas for consistent warmth.

3 Heat Settings

Low, medium, and high heat levels to match your comfort and conditions.

Long-Lasting Battery

Powered by a rechargeable battery for hours of reliable heat on a single charge.

Machine Washable

Water-resistant design. Remove battery and toss in the washing machine.

How the FlexCore Men’s Heated Base Layer Shirt - Dual Control Works

The Flexcore uses advanced conductive thread technology to deliver consistent performance without bulky wires or stiff panels.

Button Functionality

1

Press and hold 3 seconds: Power on/off

2

Single press: Cycle through heat levels (Low → Medium → High)

3

Double press: Pre-heat mode (starts on High, auto-drops to Medium)

Intensity Levels

Low , Gentle warmth for mild chill (up to 10 hrs)

Medium , Balanced heat for everyday cold (up to 8 hrs)

High , Maximum warmth for extreme cold (up to 5 hrs)

Built for Heating. Designed for everyday wear.

Comfort, Fit & Design

Designed for layering or wearing solo, this slim, flexible shirt delivers up to 8 hours of warmth from the included 10,000 mAh rechargeable battery. Built for performance, comfort, and versatility, FlexCore is the essential heated base layer for winter.

Dual Control Heating

Power front, back, or both zones separately

3 Heat Settings

Low, medium, or high for each zone

3 Heat Zones

Targeted heat on neck, chest and back

Flexible & Lightweight

Slim fit perfect for layering

Available in:

Onyx

Zones

3 Heating Zones

Zone Locations

Neck, Chest, Back

Max Runtime

Up to 8 hours

Battery Capacity

10,000 mAh

Care

Machine Washable

Material

Wind & Water Resistant

Behind the Name

Flexcore

FlexCore is named for the flexible, close-to-body warmth it delivers—think of it as your personal climate layer that bends with you instead of fighting back.

Free Shipping

On orders over $75

30-Day Returns

Easy exchanges

1-Year Warranty

Full coverage

24/7 Support

Real people, real help

Common Questions About the Flexcore

What does 'dual control' mean on the FlexCore shirt?

Dual control lets you independently manage the front zone (chest) and back zone (neck and upper back) , each with its own low, medium, and high setting. You can customize your warmth based on where you need it most, or turn off one zone entirely to extend battery life.

Is this meant to be worn as a standalone shirt or only as a base layer?

Both. The FlexCore shirt works great as a base layer under jackets or sweaters, but it's also comfortable and presentable enough to wear on its own in milder cold. The slim fit and clean design make it versatile for different situations.

How long does the 10,000 mAh battery last with both zones running?

With both front and back zones active, you can expect up to 8 hours on low, with shorter runtimes on medium and high settings. Running only one zone at a time will significantly extend battery life if you need all-day warmth.

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	Chest	Waist	Sleeve
S	34-36 in	35-37 in	24.5 in
M	39-41 in	38-40 in	25.5 in
L	42-44 in	41-43 in	26.5 in
XL	45-48 in	44-46 in	26.5 in
2XL	49-52 in	47-49 in	26.5 in
3XL	53-56 in	50-52 in	27 in
4XL	56-59 in	53-55 in	27 in

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