Microfiber Microfiber advanced technology in a high performance woven fabric to filter out very small things Soft, lightweight and breathable for the ultimate in comfort in a zippered mattress cover Dense weave and fewer seams make this encasement strong and durable for lasting protection Made in the USA, hand inspected to ensure quality; durable for repeated washing LuxGuard Mattress Encasements offer several features that provide you with the ultimate in comfort and protection. This encasement is made with soft, breathable fabric; the construction has few seams and has a small pore size. This encasement provides filters out very small things and protect Box Spring and mattress. The dense weave of the LuxGuard fabric allows for an exceptionally strong cover that will last for many years, even with frequent machine washing and drying. All LuxGuard Mattress Encasements sizes Full 9" and up come with an an L-zipper as part of the construction. This zipper travels along both the short and long side of the mattress, making installation of larger sizes much more manageable. Our 5-Thread Safety Stitch construction prevents unraveling. All zippers are reinforced and a preventive closure is placed at the end of the zipper. LuxGuard Mattress Encasements are made in the southeastern U.S. by experienced craftsmen. Each encasement is hand inspected prior to packaging to insure that you receive a high-quality product.