I purchased these on a gold deal sale for HALF price. I wore these comfy slippers for a day when I noticed a tiny little opening near a closure line area on the outside of the inner part on one of the boots. The other boot never showed a weakened area. It was the stitch line right near the middle arch of my foot...not next to the sole but above there. I believe it was a just a weakened area in the stitch line. It took three little stitches with some brown thread to be sure it would never open again. Still, I'm giving these slippers a high star mark because otherwise they are made very well and they are quite beautiful and warm. I bought the 8 size for my 7.5 shoe size and they fit nicely with a warm pair of socks. I live in upper peninsula of MI and they keep my feet so comfortable. I'm very happy with my purchase. Please note: these are NOT made for wearing in the snow or rain or for taking long walks! They are indoor slippers so don't expect them to be the type of shoe you wear for running errands!