Soft-home sleeping with sirens Kellin Quinn Post-hardcore Band Hybrid Pillowcase Cushion Covers Diy Custom Case 1 Side Size 18"x18" D46-06 50% cotton, 50% polyester. The material is made of a fine soft blend of fabrics, giving the pillow case a soft and comfortable texture. This pillowcase is for 1 side printing. This custom standard pillowcase is roomy in size (18"x18") The?custom pillow case is without?buttons,?and?has?an?opening?on?the?side. Note: Does not include pillow cotton.