BergHeat Nest heated sleeveless undershirt in black with V-neck and small pocket

A sleeveless V-neck undershirt with built-in heating wires. It warms your belly, along your spine and your lower back – right where the cold is most unpleasant. Your arms stay free.

  • Heating panels at chest and back
  • 3 settings via the button on the chest
  • USB connector for the BergHeat Power Bank 5,000 mAh
  • Hood and kangaroo pocket, unisex cut

How long the warmth lasts depends on the setting and the power bank.

Fit

  • Sizes M to 5XL, unisex
  • Asian sizing: runs 2–3 sizes small – pick by weight, not your usual size
  • Soft stretchy fabric, brushed inside

Power

  • Cable with switch in the pocket at the hem
  • Made for the BergHeat Power Bank 5,000 mAh

In the box and care

  • 1 heated undershirt
  • Washable, remove power bank and cable first

For anyone whose belly and back feel the cold first – indoors and out.

  • Cold workshop, warehouse, garage
  • Balcony, garden, farmers’ market
  • Under your shirt at the office or on the way there

Without power it’s simply a warm undershirt.

BergHeat Nest – Heated Sleeveless Undershirt, Unisex

A sleeveless undershirt that warms belly and back – thin enough to go under any shirt, sweater or jacket.

  • Heating panels at belly, back and lower back
  • 3 settings via the switch on the cable
  • Made for the BergHeat Power Bank
  • Sleeveless, invisible under your clothes
$99.09
Color Black
Size M See the size chart

Ready to order · ships within 24 h on business days

Ready to order · ships within 24 h on business days

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Ships within 24 h on business days Email support Made for the BergHeat Power Bank
Ships within 24 h on business days
3 heat settings
M to 5XL, pick by weight

Fit

Which size fits you?

Heads-up, Asian sizing: the undershirt runs 2–3 sizes smaller than you’re used to. Pick by your weight or chest measurement, not your usual size.

Undershirt with measuring lines: 1 chest, 2 length, 3 shoulder width
  1. ChestLay it flat, measure straight across just below the armholes and double it.
  2. LengthFrom the highest point of the shoulder down to the hem.
  3. Shoulder widthAcross the top from shoulder edge to shoulder edge.
SizeWeight (kg)Length (cm)Chest (cm)Shoul­der (cm)
M
L
XL
XXL
3XL
4XL
5XL
kg

Between two sizes? Go for the larger one.

Undershirt measurements, taken flat and unstretched, per the manufacturer. Allow for 1–2 cm (about 0.5 in).
Nest front and back: heating at the belly, along the spine and at the lower back

Heating panels

Belly and back first

Front on the left, back on the right.

  1. 1 BellyOne heating band across the belly.
  2. 2 BackOne long panel along the spine.
  3. 3 Lower backOne heating band over the kidneys.
Pocket at the hem with cable switch and the BergHeat Power Bank plugged in

How it works

Power bank in the pocket, press the switch

Down at the hem there’s a small pocket. Plug the BergHeat Power Bank 5,000 mAh into the cable there. The round switch on the cable picks one of three settings.

The pocket lies flat, so nobody sees it under your shirt or sweater.

  • 3 settingsVia the switch on the cable.
  • BergHeat Power BankMade for the BergHeat Power Bank 5,000 mAh.
  • WashableRemove power bank and cable first.

Everyday

What else the undershirt brings

Man with a gray undershirt under an open flannel shirt at a workbench in a cold workshop

Under your shirt

Warm without bulk

Arms free, back warm – ideal when you don’t want to sweat while you work.

Warmth

3 settings

Via the switch on the cable.

Fit

M to 5XL

Runs small, pick by weight.

Power

USB port

Made for the BergHeat Power Bank.

Care

Washable

Without power bank and cable.

BergHeat Nest heated sleeveless undershirt in black with V-neck and small pocket

Colors

Black and gray

Low-key under dark clothes.

BergHeat Nest heated sleeveless undershirt in beige

Colors

Beige and pink

Barely shows under light blouses and shirts.

Woman with a beige undershirt under a cardigan holding tea on a balcony in the morning

At home

First tea outside, even in November

No need to turn up the heating just because your back is cold. Under your cardigan it warms belly and back, and the morning on the balcony stays cozy.

  • Balcony
  • Workshop
  • Office
  • Garden
  • Market

FAQ

  • No. The cable with the switch is in the pocket at the hem. The undershirt is made for the BergHeat Power Bank 5,000 mAh.

  • It’s cut in Asian sizes and runs 2–3 sizes small. Enter your weight next to the size picker to see your size.

  • Yes, the cut is unisex. Beige and pink show the least under light clothing.

  • At the belly, along the spine and at the lower back. Shoulders and sides aren’t heated.

  • Yes. Remove power bank and cable, wash gently and let it dry completely before plugging it back in.

  • Yes. Without the power bank it’s a normal warm undershirt.

BergHeat Nest heated sleeveless undershirt in gray

Ready

The undershirt that warms your back

  • Panels at belly and back
  • 3 settings via switch
  • Made for the BergHeat Power Bank
  • Four colors, M to 5XL

$99.09

Choose size

Ships within 24 hours on business days