Abstract: An improved fluid filled insole is disclosed. One aspect of the improvement is the inclusion of openings to provide ventilation and to control flow of the fluid. The insole is formed of two superimposed sheets of flexible, fluid impervious material sealed together at selected sites to form an enclosure between the sheets capable of holding a fluid. Embodiments are disclosed wherein the openings lie on a transverse line underlying the ball of the foot, on a longitudinal line underlying the longitudinal arch of the foot, and on a transverse line underlying the heel. Another aspect of the improvement is the use of foam material enclosed between the sheets.