The Aller Ease Cotton Fresh Mattress Protector not only protects your mattress but helps to keep it fresher between washes. The allergen barrier fabric protects your mattress from dust mites, pollen and pet dander while offering waterproof protection to prevent liquids from contaminating and ruining your mattress. The cotton top fabric is breathable, quiet, and soft and is finished with FreshTech technology that eliminates environmental, pet, body, and other odors for freshness between washings. This mattress protector is machine washable and comes with a Lifetime Warranty from Aller Ease.