These heavy duty vinyl covers are durable and stand up to the most rugged conditions. Zippered mattress and boxspring covers are certified bed bug proof, and include our certified patent pending Bugstop Seal, ensuring total bed bug production. Additionally, these covers are waterproof, dust allergen proof, and fire retardant. All 6 gauge vinyl covers are treated with an antimicrobial that inhibits the growth of mold, mildew, fungi, and odor causing bacteria. These covers have a brushed silk finish and electronically sealed seams. These vinyl covers will not crack to -15 degrees F. Zippered covers use rust-proof polyester zippers.