None of them are hemmed, because they don’t fray. If you’re worried about it, try gently rubbing at the edge of it. Threads won’t come off in your hand either. Microfiber is just the size of the thread used, these are 100% polyester and completely machine washable.
Cheap, well-made fabric is available at thrift stores in the form of linens. Curtains, tablecloths, and sheets are a great source of high-quality fabrics for cheap!