A full body convective blanket has a head portion, a body portion and a foot portion. The head and foot portions each taper in a decreasing manner from a corresponding opposite side of the body portion to the head and foot ends, respectively, so that the blanket has a rectangular shaped body portion and head and foot portions that are shaped in the form of isosceles trapezoids. Two elongate openings are provided longitudinally along the body portion sandwiching a non-inflatable area. An opening is provided at the head portion of the blanket.