Protect your pillows against common allergens that can trigger allergic reactions and affect your quality of sleep. This pillow cover is certified with the Sanitized process developed in Switzerland that shields your pillow from the formation of mold, mildew and fungus, which attract mites and dander. Your pillows will stay clean, odor-free and free of common allergy triggers. The sanitized shield will last even after repeated washings and allow air to circulate as you sleep so you'll stay comfortable.