Keis heated jacket, £169.99
Time used: Two months
What’s good: This top of the range heated jacket is packed full of features including outputs to piggy-back heated gloves and insoles, a specific pocket for the optional controller (£39) and well positioned stretch panels.
The heat emanates from several large flexible panels sandwiched between a Nylon outer material and an Airtex style inner. Worn under a winter jacket it keeps you cosy in sub-zero temperatures.
What’s not: The whole point of heated clothing is that it reduces the amount of bulky insulation required to keep warm. As the Keis jacket is itself quite bulky you can only wear it under something roomy like a winter jacket, which are usually quite warm anyway.
Keis claim the collar has a heating element but if that's true, it doesn't work. If the jacket is used with the optional controller, you have to turn the jacket back on every time the power lead is unplugged, which is frustrating at fuel stops.
The jacket is electric in another way, too – it's the most effective static electricity generator I've ever owned.