Systems, devices, and methods for controlling fluid flow transfer in shoes

A fluid transfer system for shoes comprising:

• a front chamber comprising:
• a substantially U-shaped first outer periphery tube that has a first inlet at one end and a first outlet at a second end substantially opposing the first end;
• and
• a plurality of front cross tubes, each of the plurality of front cross tubes being connected at one end to a portion of the first outer periphery tube on a first side of the front chamber and extending towards an opposing side of the front chamber;
• a rear chamber comprising:
• a substantially U-shaped second outer periphery tube that has a second inlet at one end and a second outlet at a second end substantially opposing the first end;
• and
• a plurality of rear cross tubes, each of the plurality of rear cross tubes being connected at one end to a portion of the second outer periphery tube on a first side of the rear chamber and extend towards an opposing side of the rear chamber;
• a first valve assembly connected between the second outlet and the first inlet and configured to allow fluid to pass unidirectionally from the rear chamber to the front chamber;
• and
• a second valve assembly connected between the first outlet and the second inlet and configured to allow fluid to pass unidirectionally from the front chamber to the rear chamber;
• wherein one of the plurality of front cross tubes comprises one or more openings through a bottom portion thereof that are configured to pass fluid into or out of the front chamber with respect to a surrounding environment when fluid passes from the front chamber to the rear chamber or from the rear chamber to the front chamber.