The Woven™ Supima® Premium cotton pillowcase are made of superior extra-long staple cotton that is 100% American-grown. The fibers are an impressive 35% longer than typical cotton and produce smoother, softer, and cleaner yarns. The result is a luxurious fabric that gets even softer with every wash. Twice as strong as regular cotton, Supima® cotton resists pilling, breaking, and tearing. It also represents the top 1% of fine cotton and is verified by the Supima® association. The sheets feature a lustrous sateen weave and drape beautifully. Crafted with extra-deep pockets and impressive elastic lining.