It’s time to replace a fleece robe once you notice the material is getting thin or matted. Fortunately, even when a robe is worn on a daily basis, it can take a few years for it to sustain this type of wear. Another key indicator that it's time to replace a fleece robe is if the seams begin to split open. While it’s easy enough to fix a seam by hand or with a sewing machine, fleece isn’t the easiest material to work with. It’s less of a headache to simply replace the robe.