Disclosed herein is a sectional warming blanket for patient warming having a structure comprising a first layer of material forming a bottom layer with openings to allow a profusion of air through the bottom layer, a second layer of material forming an upper layer wherein the upper layer is coupled to the bottom layer via a plurality of seals to form a plurality of interconnected air passageways, and an inlet located on the upper or bottom layers. In an embodiment, the sectional warming blanket further comprises an opening configured to receive a coupling device for coupling the sectional warming blanket to an additional sectional warming blanket. In another embodiment, the sectional warming blanket further comprises at least one outline formed from a portion of the structure, such that a section can be removed from the blanket and the blanket is re-sealed by a bonding mechanism along its periphery.