Purchased 3 Bed Bug Encasements for box springs and mattress. Liked the velcro all around the zippered area but would be nice if the zipper opened a larger area of the encasement to improve ease of insulation. I purchased an encasement by a different company through Amazon. Same price. No velcro but better made. Went on much easier, one day delivery, terry cloth on topside of cover for improved comfort, different fabric. Did find a 2 inch area where seam thread pulled loose with the Harris encasement and it took 6 days for delivery. Bought 3 covers from Harris because they seem to be the specialist. Time will tell. Sprayed both mattresses and box springs then immediately put on encasements.