Pieridae Sleep Slogan Black,White and Gold Complete Duvet Quilt Bedding Cover, Bedsheet and Pillowcase Bedding Set. Sleep Sleep! All You Need Is Sleep! Featuring a modern universe printed in a variety of colours, this is one bedding set you will not want to remove. The Sleep slogan duvet cover will compliment your bedroom and help you sleep easier! This is one bedding set you will not want to remove. Made from polycotton and the bedding set is machine washable at 40 degrees and suitable for tumble dryers.