Who cares about the wooshing sound!  These are the most comfortable sandal ever made.  The bed is super soft, almost memory foam.  Extremely comfortable from the beginning.  Last a long time, even with putting them in the washer.  I wear a 9 or 9-1/2 M or W, and in this sandal I wear a 9M.  Please don't discontinue this sandal Softwalk.  p.s.  the wooshing sound does go away after a short time.