All-In-One provides maximum protection for your mattress and pillows against dust mites, pet dander and other unwanted allergens. We use strong, safe, and soft fabric, without sacrificing breathability and comfort. The All-In-One Circular Flow Collection actively promotes air flow for cooling and breathable fabric to keep you comfortable all night long. All products are water-resistant, stain-resistant, and hypoallergenic to keep your family sleeping safe. Zippered pillow protectors are sold as a 2-pack. We are so confident in the quality and durability of our products, that each purchase includes a 10-year warranty! OEKO-TEX® certified harmless for over 100 harmful substances. Great for those with children or pets. Easy-care machine washable.