Using the latest technology in breathable, waterproof fabric, these remarkable pillow covers protect your pillow from all liquid stains as well as dust mites and bacteria: a major cause of asthma, eczema, and rhinitis. This pillow cover is great for all seasons as it stays cool in the summer and warm in the winter. Completely breathable and noiseless, the unique absorbent terry cloth top layer makes this pillow cover our most comfortable and quiet product.