The Lock-Up Total Encasement Full size bed bug protection traps bed bugs in its durable encasement and keeps dust mites, bed bugs and other allergens from invading your box mattress with a durable zipper lock feature. This total encasement has a smooth double knit body and waterproof top to protect against liquid spills. This material is quiet and breathable to prevent sweating and heat. The double zipper makes it easy to put on or remove the mattress encasement. This mattress cover is machine washable and bed bug certified. The lock-up total encasement bed bug protection comes to protect against defects in material and workmanship.