Basic Protection Mattress Protector - Affordable DefenseDoes a mattress protector really protect your mattress? A waterproof mattress protector shields against spills, sweat, skin cells, and allergens, extending your mattress lifespan significantly. Most mattress warranties require a protector, sleeping on an unprotected mattress can void coverage for stains or structural damage. The Canadian Pest Management Association notes that a full zippered encasement, not just a top protector, is needed for bed bug