Our Cotton / Polyester pillow covers are made from 50% cotton fibers and 50% polyester fibers. This fabric has a thick, tight weave. This material comes in white color. The density allows for full pigment absorption, which makes it great for painting on. This fabric is cost effective and therefore great for school art and sewing classes to practice painting, shaping, sewing embroidering and heat transfer vinyl. Not recommended for sublimation. These pillow cases come with a color matched zipper for easy removal of the inserts. These are covers only, pillow inserts sold separately. Recommended Insert: 16" x 16" Polyester Filled.