US Patent 7621944 Thermal pack

A thermal pack that includes a tubular body having a first opening, a second opening, an inner surface and an outer surface. The first opening, the inner surface and the second opening cooperate to define a passage through the tubular body for the limb. The inner surface and the outer surface of the tubular body are defined by a continuous eversion-limitless film of flexible material. A temperature-retaining fluid such as a water-based gel is received between the inner surface and the outer surface. The thermal pack can be positioned at a desired location on a limb by rolling the thermal pack onto the limb.