AFTER FOUR DAYS THE SOLE ON THE BACK OF THE HEEL COMES OUT My husband LOVES these shoes for his sore knees - this would be his 3rd pair and he wears them every day even with a suit but the last one time something happened to the quality! I finally found it in stock (12D, a pretty common size) after they weren't even available on other sites. I suspect Spira had manufacturing issues as his favorite Spira sneakers are also sold out so BUY BEWARE even if you are a regular customer. We've returned…