Cultiver Linen Bedding Flat Sheet, Mustard Mustard Bedding Etsy Mustard Yellow 100% Linen Bedding Secret Linen Store Linen Bedding. Our linen flat sheet, in this exotic and earthy Mustard is pre washed for the utmost sleeping bliss, which only increases with time. Easy to care for, these richly textured, natural linen flat sheets provide aeons of comfort, sized in Single, Twin, Queen, King and Full Double. With no worries about shrinkage or fading, your Flax linen sheets will keep you cool and wrap you in nocturnal delight for many years. You will awake refreshed to greet each new day!