Dress: Get a women's polka dot backless sling dress. Material: 65% polyester and 35% cotton. Size Options: Offered in a UK 10 - UK 16. Colours: Available in white, yellow, red, black, navy blue and green. Versatile: This swing-style dress is perfect for lots of occasions both casual and more glamourous. Whether it's on the beach, at a barbecue or even for a party, you can remain stylish all year round. Design: This spotted dress is the perfect wardrobe staple if you are looking for an eye catching yet elegant look complete with a v-neckline and open back.