The BedCare Classic dust mite and mold-impermeable Low Profile Boxspring cover is made with a shorter depth to accommodate box springs with 5 in. to 7 in. depths for better fit. It is constructed of a lightweight polyester knit fabric bonded to an ultra-thin, allergen-proof ComforTech polyurethane membrane that makes this a waterproof cover as well. Because of its barrier membrane, this protective cover cannot be measured in terms of mean pore size though It is nearly zero. The soft, satin-like fabric stretches as you move for supreme comfort, making this an excellent allergen cover for your bed. Zipping your boxspring into this encasement provides total protection on all sides with no gaps or openings. Machine washable and dryable. Lifetime Warranty. Size: large. Color: White.