Abstract: An insulating jacket for covering and insulating an exterior faucet against damage from exposure to cold temperatures. The insulating jacket comprises three plastic bags arranged concentrically and all opening in one direction. The innermost bag is covered on its exterior surface with adhesive, to which is adhered loose insulating fill material. The insulated innermost bag is surrounded by a fabric sock. The fabric sock is in turn surrounded by the second bag. A woolen sock surrounds the second bag. The third plastic bag surrounds the woolen sock. The open end of the resultant assembly is rolled to form a cuff. A draw cord is disposed to constrict the cuff over a faucet, pipe, or other component of the object being protected.