These economical mattress encasings are a great choice for covering your box spring, as they provide complete protection against dust, dust mites, and their allergens without a vinyl smell. Using a unique combination of three bonded layers of engineered nonwoven fabric, these box spring covers are vinyl-free, and highly effective against dust mites, their residues, and cat danders. Lightweight and inexpensive, this encasing is ideal for box springs , college dorm rooms, travel, and anyone looking to combat dust mite allergens on a budget.