BedCare Elegance Zippered Mattress Covers - The Encasings You Prefer To Sleep On Instead Of Your Sheets! BedCare Elegance encasings are for those who want the very finest, most luxuriously soft and cool encasings available anywhere. Because allergen protection is the number one reason to purchase pillow and mattress encasings, Elegance covers are made from a high performance, 100% polyester microfiber fabric that blocks all dust mite allergen and most other particles as small as cat dander. They offer all of this protection while remaining breathable and cool beneath your sheets, so you always sleep comfortably. And we take extra care in the design and construction of Elegance encasings with features such as covered zippers, bound seams and side panels to give them a perfect fit even after repeated washings. We believe you won't find a finer, more comfortable encasing anywhere at any price. Mean pore size of 3.2 microns. Lifetime Warranty. 18inch California King Size measures 73inch Wide x 84inch Long x 18inch Deep.