Patent ID: 7691084

Claim:
A foot covering comprising: a body portion including an inner surface defining a foot receiving cavity and an outer surface, an interior of the body portion being between the inner and outer surfaces, the body portion having a relaxed state when the interior of the body portion is at ambient pressure and having a contracted state when the interior of the body portion is at a pressure which is less than ambient pressure, the body portion being configured to apply a predetermined amount of pressure to tissue of a foot received within the foot receiving cavity when the body portion is in the relaxed state, the interior of the body portion adapted to contain a fluid; and a fluid controller fluidly connected to the interior of the body portion for removing fluid contained in the interior of the body portion, the body portion being configured to contract from the relaxed state to the contracted state upon removal of fluid from the interior of the body portion, the body portion applying less than the predetermined amount of pressure to tissue of the foot received in the foot receiving compartment when the body portion is in the contracted state.