This is the Akona Tiffany Blue Women&';s Short Sleeve Rash Guard for Scuba Diving Features: Designed to reduce UV exposure 8 oz. 4-Way Flex nylon/Spandex composite Breathable, flatlock-stitched seams 50+ U.V. Protection blocks 97.5% of harmful rays Fast drying and odor resistant Stay protected from the sun&';s harmful ultraviolet radiation with Akona&';s 8-ounce rash guards. The four-way flex nylon/spandex material has a 50+ SPF rating that safely blocks 97.5% of the sun&';s harmful rays.