Cotton Fabric: Made from 100% cotton for softness and breathability. Standard Size: Fits most standard pillow sizes. Ralph Lauren Branding: Features classic Ralph Lauren styling. Machine Washable: Pillowcases can be conveniently washed in the machine. Envelope Closure: Pillowcases close securely with an envelope style closure. Set of 2 Ralph Lauren Dunham Sateen Standard Pillowcases Charcoal Gray -300 Thread Count 100% Cotton100% cotton Machine washable.