Fully protect your mattress investment by using Protect-A-BedAllerZip Bed Bug Protection Kit. AllerZip Bed Bug protection kits gives you COMPLETE mattress protection for a healthy, bed bug free sleep zone. Patented BugLock (US Patent 7,552,489) three-sided zipper and AllerZip seal gives you total protection against dust mites, allergens and bed bugs. AllerZip mattress encasement is completely Bed Bug entry, escape and bite proof.