The Cool Bed 3 Cover Fitted Sheet is the most affordable, durable option available in Cool Bed 3 Cover Accessories! This linen/cotton blend fitted sheet is available in two fashion colors to match any decor. Three sizes of the Cool Bed 3 Cover Fitted Sheets are designed to be used with the appropriate Cool Bed III. To maximize the cooling effect of the Cool Bed III, these sheets are made with an All-Natural blend of linen and cotton fibers. The sheets are lightweight for maximum performance, and are not machine-washable.