How do the slippers heat up?
A heating element is built into the lining. Connect a USB power bank inside the side zipper pocket, press and hold the ankle button to switch on, then press again to choose low, medium or high.
Are power banks included?
No. Each slipper needs its own USB power bank, so you need 2 per pair. Use your own compatible power banks or add the Nuvella Power Pack (2 power banks) to your order.
What size are they?
One size fits most [CONFIRM size range]. The adjustable drawstring cuff gives a snug, secure fit.
How long does the warmth last?
It depends on your power bank's capacity and the heat level you choose [CONFIRM typical hours].
Are they safe?
They run on low-voltage USB power, and the heating element sits inside the lining. Use them as directed, keep them away from water, don't wear them while sleeping, and stop using them if anything is damaged.
How do I clean them?
Remove the power bank, then spot clean with a damp cloth and mild soap. Don't machine wash, tumble dry or soak them.
Do you ship worldwide?
Yes. See our Shipping page for delivery times.
What if I don't love them?
You're covered by our 30-day comfort promise. Contact us within 30 days of delivery.