Box Spring Encasment by Health GuardEncasing your box spring might not be the first thing on your mind when you are setting up a bed, but it is worth thinking about. Your box spring sits close to the floor, in the dust zone. Over time it accumulates the same allergens, dust mites, and debris that build up in any fabric left in a bedroom. The Health Guard Box Spring Encasement wraps around the entire unit, all four sides, top and bottom, sealing it completely from the outside