What Happens when you add water? You turn intro An Instant Mermaid of course, and you need protection for your mermaid perfect skin. You'll get the needed protection with our UV 50+ Protection Shirts. Not only does it protect your skin from the harmfuls rays of the sun but they are light weight, quick drying perfect for those hot afternoons on the dive boat! When ordering keep in mind that these shirts are unisex in size.