COST EFFECTIVE FOR BOXSPRINGS| These SMS mattress protectors offer protection from dust mite allergens, bed bugs and other allergens but the non-woven fabric is much less expensive than cotton or even polyester fibers making it a great option for a box spring since rarely will it be removed or come in contact with your body TOTAL PROTECTION| These SMS mattress protectors offer protection from dust mite allergens, bed bugs and other allergens UPGRADED ZIPPER CLOSURE| The closure is an auto locking YKK zipper which locks in place so that it will not open on its own or backtrack. Insuring there are no small openings behind the zipper is important when trying to keep your box spring free of irritants INDEPENDENT CERTFICATION| Waterproof barrier is tested via PMI labs for minimum pore size unlike products listed on Amazon by sellers located in China that offer not supporting tests for their claims. The fabric is Oeko Tex certified means no harmful substances were used in the production of the material TRUSTED COMPANY| Your Healthy Home is a division of Narcote, a 70 year old US company specializing in high performance fabrics like allergen barrier fibers. Our lifetime warranty on workmanship underscores our confidence in the product and our history instills confidence to our customers LIFETIME WARRANTY| Workmanship on every cover is made to last a lifetime, if it fails, send it back for a freer replacement, for life. MACHINE WASHABLE| These can be washed in cold water and hung to dry.
