TThe AllerEase Cotton Fresh line is the avenue of clean and comfortable. The Cotton Fresh Pillow Protector is crafted from 100% cotton and zips around your pillows creating a cocoon of pristine softness to promote clean, healthy sleep. The allergy defense fabric acts as a robust barrier to help keep common household allergens -such as pollen, pet dander, dust, and dust mites- at bay. Best of all, these protectors are machine washable for easy care and backed by AllerEase's lifetime warranty.