Throws shade at lesser dresses, brings shade everywhere we go. The Blocker blocks 98% of UVA and UVB rays, giving us UPF 50 that won't wash off thanks to the unique knit. Yup, no chemical finishes, no trickery, just a densely-knit but breathable, burn-blocking knit. Now that's a real sundress. Thumbholes. 32½" long on size M. Nylon/poly. XS(2), S(4-6), M(8-10), L(12-14), XL(16).