Fantastic Protection Protect your mattress with strong tearresistant polyethylene bags. These bags are perfect for moving or storing your mattress or box spring. Guards Against Dirt and Pests Get reliable protection from dust, stains and rips, as well as mice and other pests. These durable bags can also be used to dispose of an old mattress. Product Strength 4 Mil thick plastic makes the bags extra strong and rip resistant compared to many other bags that are only 2 mil and 3 mil. Product Sizing Twin Twin XL Split King 98" x 40" x 14"These bags are desinged to fit any crib, Twin Extra Long, Split King Sized Mattress or Box Spring.