The Lucid encasement mattress protector offers quiet, breathable comfort while eliminating the passage of bed bugs to and from your mattress. The waterproof zipper completely locks out allergens and dust mites, ensuring the best allergy protection available. This 100% waterproof protector surrounds the mattress with quiet, breathable fabric for a comfortable and healthy sleep environment. The waterproof barrier allows air to pass for breathable comfort while protecting the mattresses from fluids, spills and stains on all sides.