Varmo comes in two sizes: S covers EU 35–40 (UK 2.5–6.5) and L covers EU 41–46 (UK 7–11.5). Both have printed trim lines — find your size on the footbed and cut along the dashed line with regular scissors.

Cut slowly along the dashed line marked with your size, keeping to the printed curve. The heating film sits under the ball of the foot and arch, well below every trim line, so it is never affected. If you are between sizes, cut the larger line first and trim again if needed.

Up to 8 hours on Low, around 5 hours on Medium and about 3.5 hours on High. Battery life drops slightly below freezing, as with any lithium cell.

About 3 hours from empty using the supplied USB-C cable and any standard 5V phone charger. A small LED turns from red to white when charging is complete.

The insoles are IPX5 water resistant, so sweat, slush and rain are fine. They are not built for submersion — never put them in a washing machine or leave them soaking. Wipe clean with a damp cloth and air dry.

The remote pairs to both insoles at once and works up to 10 metres, so you can change heat level through a jacket pocket or glove without taking your boots off.

No. The complete build is 3.5 mm thick with a flexible carbon heating film, so it feels like a normal cushioned insole.

Two years on the insoles, battery and remote, covering manufacturing faults. Ordinary wear from trimming and daily use is not covered.

Shipping

We currently ship to UK addresses only. Orders are processed within 1-2 business days, with delivery typically taking 10-15 business days depending on customs (allow a few extra days during Nov-Jan peak season). Shipping is free.

You'll get a confirmation email once your order ships, with status updates — note that detailed real-time tracking isn't available. If your order hasn't arrived within 20 business days of shipping confirmation, email support@varmo.co.uk with your order number.

Returns

Yes. You have the legal right to cancel your order within 14 days of delivery, for any reason — no explanation needed. Just email us at [email] within that window, and you'll have another 14 days to send the item back. We'll refund you in full (including original delivery cost) within 14 days of receiving it back. Return shipping is at your own cost, unless the item is faulty.

Got a sizing issue or a small problem with your insoles? Contact us first — we can often sort it with a quick fix or replacement part, no return needed.

Item arrived faulty or damaged? Let us know with photos and we'll send a replacement or full refund, return shipping included, at no cost to you.