OEKO-TEX & BSCI Certified: Our queen size pillow case set of 2 is BSCI and OEKO-TEX certified, ensuring both responsible production and premium materials. Easy Care & Maintenance: Machine wash on cold with similar colors then tumble dry on low. The cotton fabric will become softer with every wash. 100% Cotton Pillowcases: Crafted from pure cotton with a 200-thread-count percale weave construction, these percale pillow cases standard size are breathable and soft to the touch. The sets come in a fabulous selection of colors to match your casual lifestyle. Open Closure: Sleep soundly and enjoy a restful night's sleep with our hypoallergenic cotton pillowcases. The open type closure makes it easy to put in or take out the pillow. Standard/Queen Size Pillowcases Set of 2: 20 x 30 Warm Tips: 100% cotton pillow case is made of pure cotton fabric, but due to its fiber, cotton fabric is not wrinkle-resistant. To minimize wrinkles, we recommend removing your pillowcase from the dryer promptly.