Snoozewise Allergy Pillow Covers with Zip Encasement. Bonus Sleeping Mask and Earplugs 100% polyester Features - one pack standard size (22.4 X 14.4 Inches) 100% polyester, Case prevents dust mites Health - snoozewise pillow cases are hypoallergenic and they resist dust, bed bugs, dust mites Durable - our zippered pillowcase protectors are soft, gentle and very strong High quality - made for longevity and luxury with a breathable cooling membrane Cleaning - simply machine wash on cold and tumble dry on low