Calvin And Hobbes Custom Rectangle Pillow Case 20"x30" One Side Design It is made with medium weight ,high quality 50% cotton ,50% polyester for comfort and durability With pre-shrunk fabric ,this pillowcase is washable at 60 celcius. The pillow cover has an invisible zipper closure that allows easy insertion and removal of pillow inserts. This cushion cover could surely provide a warm ,welcoming feeling to your daily life. Custom designed pillowcase ,add a touch of elegance to your home decor with decorative throw pillows.