An article of footwear includes an upper and a sole coupled to the upper. The article of footwear includes a vacuum pump assembly. The vacuum pump assembly includes a flexible bladder and a pump disposed in the sole and in fluid communication with the bladder. The pump removes air from the bladder to draw a vacuum within the bladder. The pump includes a plunger that activates the pump in response to the application of force against the sole. The bladder constricts and conforms the upper against the wearer's foot as the pump removes air from the bladder to generate the vacuum.

A temperature-adjustment shoe sole, including a supporting member. The supporting member is provided with an air guide channel. A semiconductor temperature control unit, wherein the semiconductor temperature control unit is arranged in the supporting member. The semiconductor temperature control unit has a first temperature control end and a second temperature control end. The first temperature control end of the semiconductor temperature control unit is in contact with an air fluid in an accommodating space to generate a first air fluid. The second temperature control end of the semiconductor temperature control unit is in contact with the air fluid in the accommodating space to generate a second air fluid.

A temperature-adjustment shoe sole, including a supporting member. The supporting member is provided with an air guide channel. A semiconductor temperature control unit, wherein the semiconductor temperature control unit is arranged in the supporting member. The semiconductor temperature control unit has a first temperature control end and a second temperature control end. The first temperature control end of the semiconductor temperature control unit is in contact with an air fluid in an accommodating space to generate a first air fluid. The second temperature control end of the semiconductor temperature control unit is in contact with the air fluid in the accommodating space to generate a second air fluid.

Provided is an insole that is thin but has high ventilatory performance and high safety. An insole includes an air intake path, an air release path, an air intake check valve configured to include a base member provided with an open/close hole formed therein and a valve element controlled to open and close the open/close hole, an air release check valve configured to include a base member provided with an open/close hole formed therein and a valve element controlled to open and close the open/close hole, and a pump chamber configured to communicate with the air intake check valve and with the air release check valve and formed in a flat shape to include at least a partial area in front of a position of an arch of foot, or a pump groove portion configured to form the pump chamber.

Provided is an insole that is thin but has high ventilatory performance and high safety. An insole includes an air intake path, an air release path, an air intake check valve configured to include a base member provided with an open/close hole formed therein and a valve element controlled to open and close the open/close hole, an air release check valve configured to include a base member provided with an open/close hole formed therein and a valve element controlled to open and close the open/close hole, and a pump chamber configured to communicate with the air intake check valve and with the air release check valve and formed in a flat shape to include at least a partial area in front of a position of an arch of foot, or a pump groove portion configured to form the pump chamber.

A forced-air footwear is presented and comprises a foot supporting portion including a sole with cavities therein covered with a foot-contacting layer, and a channel communicating between the cavities and the interior of the footwear to allow air flow between the cavities and the interior of the footwear; a foot covering portion, the foot covering portion including a valve allowing air passage therethrough in a single direction, the cavities including a compressed configuration, when supporting a weight of a wearer, and an expanded configuration when not supporting the weight of a wearer, the passage between the compressed configuration and the expanded configuration forcing an air movement of the air contained in the cavities, the valve blocking the air movement in one direction, wherein the compression of the cavities and the blocking action of the air by the valve is forcing air through the footwear.

A temperature-adjustment shoe sole, including a supporting member. The supporting member is provided with an air guide channel. A semiconductor temperature control unit, wherein the semiconductor temperature control unit is arranged in the supporting member. The semiconductor temperature control unit has a first temperature control end and a second temperature control end. The first temperature control end of the semiconductor temperature control unit is in contact with an air fluid in an accommodating space to generate a first air fluid. The second temperature control end of the semiconductor temperature control unit is in contact with the air fluid in the accommodating space to generate a second air fluid.

A temperature-adjustment shoe sole, including a supporting member. The supporting member is provided with an air guide channel. A semiconductor temperature control unit, wherein the semiconductor temperature control unit is arranged in the supporting member. The semiconductor temperature control unit has a first temperature control end and a second temperature control end. The first temperature control end of the semiconductor temperature control unit is in contact with an air fluid in an accommodating space to generate a first air fluid. The second temperature control end of the semiconductor temperature control unit is in contact with the air fluid in the accommodating space to generate a second air fluid.

A footwear article having a vacuum release mechanism is disclosed. The vacuum release mechanism equalizes pressure to release a vacuum created beneath the footwear article, thereby eliminating an undesired retention of the footwear article in high-viscosity materials such as mud or concrete. The vacuum release mechanism includes at least one check valve disposed in at least one fluid passageway formed in a sole of a footwear article. The at least one fluid passageway fluidly connects an exterior environment with an interior of the footwear article.

A footwear article having a vacuum release mechanism is disclosed. The vacuum release mechanism equalizes pressure to release a vacuum created beneath the footwear article, thereby eliminating an undesired retention of the footwear article in high-viscosity materials such as mud or concrete. The vacuum release mechanism includes at least one check valve disposed in at least one fluid passageway formed in a sole of a footwear article. The at least one fluid passageway fluidly connects an exterior environment with an interior of the footwear article.