An encasement zips around all six sides of the mattress rather than fitting over the top like a protector. That full 360-degree seal is what makes it effective against bed bugs and dust mites, which a fitted protector cannot stop.
It also guards against spills and allergens. Choose an encasement if you are treating an infestation, managing allergies, or protecting a mattress in a rental or dorm. Six sizes, twin through CA King.
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