A flexible treatment cover flows conditioned air onto a person positioned under the cover to assist in maintaining proper body temperature. The treatment cover has an inflated in use position above and out of contact with such person and a deflated flat stored position. Generally, the cover comprises a plurality of arch shaped air pockets fabricated of flexible material and connected together in series adjacent one another. Openings between adjacent air pockets allow inflation air to flow from one pocket to the next until the pockets are fully inflated. A separate air chamber on the underside of the cover has perforations which allow conditioned air to continuously flow out of the chamber onto the person under the cover. Air is supplied to inflate the air pockets and to continuously supply conditioned air to the air chamber.