Slippers: Get sherpa lined USB powered, indoor heating slippers. Design: Super comfy design with a plush-embedded inner layer and fashionable outer material so it looks stylish but keeps you warm. Dimensions: 31cm x 25cm x 4cm. Power: USB 5V carbon fibre heating element that plugs into the USB port, each shoe has its own heating chip that requires one USB port or adapter to maintain warmth. Features: Enjoy fast and efficient USB powered heating and the material is made of thermal PVC for double the warmth. Options: Each colour has its own size, choose pink for UK3-7 or grey for UK3-11. Sherpa Lined Usb Heating Slippers | Living Social | Living Social