Sequin Backless Dress. There's a lot of sexiness in this sequin backless dress, be prepared for a lot of attention stepping out in it! Shell - 100% Sequin. Lining - 100% Polyester. Stretch fit. Elastic around neck, armholes, back waist and hem to stop scratching. Tie up neck. Fully lined. Centre back skirt to hem length is 34.5cm. So buy this Sequin Backless Dress Was £40.00 Now £9.99.