Keis heated apparel is designed to cope with the demands of winter outdoor activities. Keis have developed heated clothing specially to keep motorcyclists warm in cold weather. The Keis Heated Insoles use micro alloy element technology for advanced heat radiation which gives an even level of heat across the soles of your feet. The insoles are made from a rugged PU Foam with a moulded heel for durability and will trim to fit snugly into your existing boots (although we would recommend that these are waterproof). The Keis insoles come complete with the Keis wiring harness and full instructions. The insoles will draw about 1.3 Amp, power is 15 Watts. The Keis heated insoles are a dual power device meaning they can be powered by the supplied bike battery connection or the optional Keis portable battery pack. Please note the Keis controller is not included. Size Guide: Small UK 4-5 (EU 37-38), Medium UK 6-7 (EU 39-41), Large UK 8-9 (EU 42-43), Extra Large UK 10+ (EU 44+).