Polyester Size and Material: polyester fabric, 4-piece set (excluding inner packing) applicable to 18 x 18 inches (45 cm x 45 cm), with a tolerance of 1~2 cm due to manual measurement Invisible Zipper: the zipper slides smoothly, and the invisible stitching zipper at the bottom of the pillowcase is designed for comfort. The pillow can be easily inserted and removed, removable and cleaned. Delicate Decoration: the design is clear and detailed, without blurry letters or colors. Using these bright and imaginative pillowcases is a convenient way to add color to your home while using your existing sofa pillows. Unique Design: modern fashion style design, easy to match your sofa and any decoration, simple color, unique style and pattern, but do not lose taste, full of design sense and imagination, let these cushion cover try to bring freshness and vitality to your comfortable home, let your guests praise. Easy to Maintain: machine washable, not bleached, low temperature drying, not ironing, even though they undergo countless cycle of washing, they still appear as new!