Performance Muslin Pillowcase White Reusable (709172_DZ) 12/DZMuslin pillowcases combine comfort, breathability and durability, making them an excellent choice for a restful night's sleep. Muslin pillowcases are easy to care for and can be machine washed and dried, making them convenient for everyday use. The fabric dries quickly, which is beneficial for maintaining hygiene and for quick turnaround after laundering. At 34 x 42 inches, these pillowcases are large enough for king size pillows.