Sanderson Flat Sheets Sanderson 600 Thread Count Single Flat Sheet (white) combines impeccable design and an elegant colour palette with beautiful materials and exquisite finishing details to create a range that will work in both modern and more traditional interiors. Our superb Luxury Egyptian Cotton (600 Thread Count) plain dye collection is available in six colours to perfectly complement the main range designs and a selection of generic accessories allows each customer the freedom to create their own bed and express their own individual style.