Quantity = 1 Waterproof (Brown color top side) / Water resist (Blue color bottom side) internal zipper cover 58"X40" to secure the Dogbed4less brand pet bed stuffing for XXL 55"X37"X4" memory foam pad or 55"X37" pillow. This size of cover is also design to fit 4-6 queen size bed pillows. Please see my other listing for complete pet bed product. * Internal zipper cover is water proof fabric on 1 side and breathable water resist on other side to create an air circulation. Please use the brown color side on the top according to the label to prevent any liquids entering to memory foam and prevents the growth of allergens. Great for older dog with bladder problem. * The internal zipper cover is made by light weight Taffeta fabric. Black color breathable water resist side is only 80% waterproof. Non machine washable and dry-able. Recommend to hand wash only with mild detergent. Please use the correct waterproof side on the top to enable the waterproof feature. * The internal cover is use to secure any stuffing with easy zipper. The cover will ship out in less than 1 business day by USPS mail. * Need an external cover or complete pet bed? Click the Dogbed4less link on the top next to the title to see more sizes, color and pet bed selection.