With a commitment to your well-being, the AllerEase Ultimate Mattress Pad boasts a range of features to transform your bedtime experience. The Allergy Defense Fabric shields against common household allergens like pollen, pet dander, dust, and dust mites while the plush top layer offers a luxuriously soft surface to rest on. The temperature balancing component insulates heat when you're cold and wicks moisture when you're hot. The superior fit sidewalls stretch to fit mattresses up to 18 inches deep.