Abstract: An insulated elastic cover that slips snuggly over interior or exterior door knob. It is constructed in a manner that allows locking and unlocking actions, as well as the ability to turn the door knob. Invention takes advantage of state-of-the-art materials to maximize insulating properties while minimizing bulk. Additionally, material is impregnated with anti-bacteriological medium that destroys hand-borne bacteria transferred from hand to door knob.