Recently as a treat for my sore back, I ordered this product. The cover material is much better than others, but the edges are already fraying with thin thread- like material. Since I detest fleece because everything sticks to it, and because these are not cold enough to give me even 10 minutes of the type of cold I need for my back, I leave the cover off. Rather than return both of them because they were quite expensive, I’ve decided to keep them and halve the large one for use on my neck whereSee full review