9-zone heated gilet, black, size 3XL

How the heating works

Nine heating pads sit inside the gilet: one at the back of the neck, two across the back shoulders, two in the middle of the back, two on the front and two at the waist at the back. A USB lead in the pocket plugs into a power bank, and one button on the chest switches the heat on and steps through three settings. All nine areas run together from the one button.

The supplier quotes these battery times from a 10,000 mAh power bank:

Cold weather and an older power bank give less. A coat over the gilet keeps the heat in and lets you use a lower setting.

Size chart in cm (you are viewing 3XL)

"Laid flat" means measured straight across the front from armpit to armpit. Double it for the full chest. The maker allows 2 to 3 cm of difference because the garments are measured by hand.

This gilet comes up small. It is cut to Asian sizes: the maker says 1 to 2 sizes smaller than UK and European sizes, and buyer reviews of these heated garments say 2 to 3 sizes. The heating pads work best close to your body, so choose a size that is snug over a thin jumper rather than loose over a thick one. Measure a gilet or body warmer you own, or read our size guide.

Power bank

The power bank is not included. Any 5V USB power bank with a standard USB-A socket will run the gilet; the supplier lists 5V as its voltage. Our 10,000 mAh power bank fits in the pocket. Not sure whether a gilet or a jacket suits you better? See heated gilet vs heated jacket.

Washing and care

Unplug and remove the power bank, then tuck the lead into the pocket. The maker recommends hand washing: do not wring the gilet hard, and hang it up to dry naturally. The maker says the power socket has a sealed, waterproof design, but let the gilet dry completely before you plug in again. Step-by-step tips are in how to wash heated clothing.