The trim lines made sizing simple, and the black insole fit my smaller winter shoes after one careful cut

I liked that the cable was long enough to route from the black insole without feeling pulled inside my work boot

I checked the heaters with my USB meter before putting them in my black boots, and they warmed up fast for my evening walk

Easy to trim and quick to warm

I laid both insoles on my blue floral sheet, connected them to a power bank, and my feet stayed cosy while cycling

This pair looked thin on my rug, but once inside my boots the warmth spread nicely across my toes

Nice heat from a simple USB plug

I used these during early shifts outside, and plugging them into my power bank kept my toes comfortable for hours

Warm feet during cold dog walks

Kept my toes cosy at work