Bladder systems with closable fluid line and foot supports including such bladder systems

A bladder system, comprising:

• a first thermoplastic elastomer layer joined to a second thermoplastic elastomer layer at one or more seams to form an interior fluid chamber comprising:
• a foot support bladder portion, wherein a heel portion or a midfoot portion of the foot support bladder portion forms an outwardly extending flap;
• a fluid reservoir portion;
• a first fluid line extending between the fluid reservoir portion and the foot support bladder portion;
• and
• a second fluid line extending between the foot support bladder portion and the fluid reservoir portion, wherein a first portion of the second fluid line extends through the flap, wherein a second portion of the second fluid line extends away from the flap, along a medial heel edge of the foot support bladder portion, and to a medial heel region of the fluid reservoir portion, and wherein the second portion of the second fluid line and the first fluid line:
• (a) extend between the foot support bladder portion and the fluid reservoir portion, (b) are located adjacent one another, and (c) are separated from one another by a portion of the one or more seams.