Your feet will warm up within minutes with this electronic footwarmer. You simply switch it on to one of the three settings and slip your feet into what looks like a giant slipper or booty. The inner lining is made from a cosy fleece which can be easily removed and hand washed. There is a special safety feature which protects this footwarmer from overheating and it will cut out after 90 minutes as an extra safety feature. Although this is made for larger feet, we think this would be rather snug if you have feet that are a size nine or above.