Arc4life Pillow Covers and Protectors for Bed Pillows - Zippered Pillows Cases Protect Your Travel, Queen Standard and King Pillows with zippers. Dust mite pillow cover (white, Medium Dust Cover) Polyester Made in USA Protect from dust mites, mold spores, pollen, bed bugs, ped dander and other allergens Zip Up Pillow Covers are easy to put on and take off Durable Easy to put right into the washing machine- can Withstand more than 100 washings Polyester-cotton Fabric