These are very good looking shoe covers, and have a great access point for tightening shoes on the go. However, the rear zipper design is terrible. It is not long enough, so a lot of force has to be used to put the bootie on over shoes. I wear a 42.5 and purchased a large, so this is not a sizing issue. The heel seams started separating after my 2nd wearing due to the poor zipper design. I will be sending back to Backcountry shortly.