This 100% microfiber solar fabric is lightweight and rated up to UPF 50 u/v protection, which is built directly into the fabric. It's perfect for various athletic and outdoor applications. It has permanent moisture-wicking and is stain, odor, and microbial resistance. The edges are not sewn and may fray over time and with use but will still last a very long time. There is 1 seam with a FRIO tag sewn in.