Abstract: A comfort sole arranged to be mounted in a shoe extends from the heel portion of the shoe to approximately the arch. The sole has a resilient upward curved portion intermediate the sides thereof in the area of the heel portion to form an air chamber between it and the sole of the shoe. This curved portion is arranged to flex up and down due to lifting and lowering of the person's foot while walking or running to pump air from the air chamber around the foot. The comfort sole has a cross sectional shape including thickened side portions which provide good fit and good support of a person's foot. A portion of the shoe may be recessed under the upward curved portion to increase the size of the air chamber.

Abstract: An inner liner is provided for a shoe that makes the shoe waterproof and at the same time allows the foot to breathe. To accomplish this purpose, such a liner is constructed of a material that is impervious to water but is pervious to perspiration vapors. The liner comprises a sock-like configuration shaped to fit within a shoe upper and attached to the top and bottom portions of the upper, such liner having fold portions similar to fold portions at the front of the shoe to allow expansion and contraction thereof when the shoe is placed on the foot and removed. The liner may also employ a novel seam in joined portions thereof, and its particular structure allows it to be combined with all conventional types of shoe constructions.

Abstract: An inner liner is provided for a shoe that makes the shoe waterproof and at the same time allows the foot to breathe. To accomplish this purpose, such a liner is constructed of a material that is impervious to water but is pervious to perspiration vapors. The liner comprises a sock-like configuration shaped to fit within a shoe upper and attached to the top and bottom portions of the upper, such liner having fold portions similar to fold portions at the front of the shoe to allow expansion and contraction thereof when the shoe is placed on the foot and removed. The liner may also employ a novel seam in joined portions thereof, and its particular structure allows it to be combined with all conventional types of shoe constructions.