I have been waiting for a product like this to land on my desk for a while; all the women in my family have zombie feet: they move around like living feet but are basically cold and dead inside. I spend six months of the year in double socks trying to avoid the inevitable onset of painful chilblains and can chase my husband out of a room by placing a frozen big toe on any part of his body, it’s like an incredibly lame super power - just call me Captain Frost Feet!

These insoles are the first connected and heated insoles created by Digitsole, who specialise in smart footwear that lets you keep track of your activity via the foundations and an often-overlooked part of your body: your feet. The Warm Series wants to bring a little comfort into your chosen activity by allowing you to regulate the temperature in your shoes, as well as provide you with information about your daily activity. These insoles connect to your smartphone with the Warm Series App via Bluetooth and are compatible with iOS (9.0 and above) and Android (5.0 and above) devices. It’s on the app that you can control each insole’s temperature (in case you have one foot colder than the other). These insoles can be used in your bike, motorcycle, ski or hiking shoes, as well as accompanying you on your day-to-day activities and work. You can select a temperature between 20°C and 45°C / 68°F and 113°F.

These insoles are available in 6 sizes (from 36 to 47) which you can then cut down into the precise size and shape for your shoes. The battery is rechargeable (USB lead included) and can provide you with 2-8 hours of heat depending on your setting. The battery is built into the heal and is also 100% secure from accidents.

When I first unboxed the insoles, I wasn’t convinced the chunky and firm heal would be comfortable in my shoe. It definitely takes a little getting used to, as your feet sit a little higher in the shoe than before and can affect the shock-absorbing quality for more technical shoes. However, it feels natural after a few wears and remains secure throughout. There are a few annoying issues that will prevent these from becoming the cure for my cold feet: I needed the temperature set to the max limit for it to warm my toes, which only provides about 2 hours’ worth of use, therefore limiting their usability for things like hiking or skiing. My major peeve, however, was that you need to remove the insoles to charge them AND switch them on - it is so annoying to lace up your shoes only to realise you haven’t switched them on!

The Warm Series are well on their way to becoming an awesome product, but it is difficult to justify their price tag with the current functionality issues. However, if you have bags of cash, chilly toes and a healthier amount of patience, they could still be worth money. RRP €199.99

3.5 out of 5

Current Cheapest Price


Each insole can be paired independently

20°C and 45°C / 68°F and 113°F temperature range

Absorbing and hygienic

Easy to adjust size

100% safe battery


Accurately records steps, calories burnt, distance and route walked



You need to remove insoles to charge and switch on

Feet sit higher in the shoe

Could affect impact properties of more technical shoes

Doesn’t sit perfectly in every design of shoe