Flat sheet: Get an 100% cotton flat bedsheet! Anti-allergenic: Ideal for those who suffer with allergies. Comfortable: A flat sheet made using super soft and breathable 100% cotton. Dimensions: Check out the specific dimensions for each size below. Machine washable: Easily machine washes at up to 60 degrees. Colours: Choose from white, powder blue, navy or frost grey. 100% Cotton Flat Bedsheet | Navy | Living Social