miah. Oyster Brown 400 Thread Count Egyptian 100% Cotton Fitted Bed Sheet. 100% Egyptian Cotton (400 Thread Count). Superior quality 400 Thread Count Egyptian Cotton. Keeps you cool in Summer and warm in Winter. “Perfect corners” made possible by an extra seam. 400 Thread Count. 100% Cotton. Our 400 Thread Count Egyptian Cotton bed linen is for those who appreciate the finer things in life. With its Sateen Weave, woven from long staple fibres, it’s extremely soft and has a beautiful drape as a result. This is the highest thread count you’ll ever need – we promise!.