NWT Lilly Pulitzer UPF 50+ Luxletic Dania Dress in Size Medium. This Luxletic look is made from Meryl Nylon, which offers a high-performance combination of moisture management and UPF 50+ sun protection. A collared V-neckline tops off this fitted, sleeveless tennis dress, which is thoughtfully designed with a built-in bra and practical undershort. Shorts are not attached to the dress.