The sandals have a flaw in the angle of the upper strap to the attachment ring that resulted in the top velcro strap connecting at an skewed angle.  As a result, the strap is pushed toward the back of the ring.  One of the rings ultimately broke after about two months making the show unusable.  The side and back velcro strips also are frayed in spite of the fact that they were not worn daily and never in the rain.