Mustard Linen Sheet Set 1 Flat Sheet and 1 Fitted Sheet and 2 Mustard Linen Duvet Cover Set 1 Duvet Cover and 2 Pillowcases in Mustard Color Linen Duvet Cover Softened Linen Bedding Set, Duvet Cover Flannelette Mustard Plain Dye Pillowcases Adairs. This high quality pair of flanged linen pillowcases in Mustard coloured, pure European linen is beautifully designed and hand finished with a bespoke feel. Add elemental style to your bedroom dcor with these matching Mustard linen pillowcases that seem both exotic and tailored at the same time. These pillow shams feature an extra 2 frame for a crisp look that is completely comfortable as well. Match with your other Curry bedding pieces or choose another rich deep linen colour for contrast.