For an inexpensive mattress cover, you may want to consider the Ultimate Guardian Bed Bug-Proof Mattress Protector. It comes in every size, and it's even laboratory tested to ensure no bugs will get through. This mattress cover is made from a cotton-polyester blend, so it doesn't feel like plastic.
The PlushDeluxe Zippered Mattress Encasement With an admirable 4.7 star rating from consumers, this mattress cover is one of the best in preventing against bed bugs, dust mites, bacteria, and allergens such as pollen. This encasement is both waterproof and quiet; it won't make a crumbling sound when you get into bed or change positions.
SafeRest premium bed bug mattress covers were specifically designed for full bed bug, fluid and dust mite protection and offer an exclusive patent-pending 360° Secure Micro Zipper. SafeRest encasements have been lab tested and certified bed bug proof by Snell Scientific and are registered as a class 1 medical device with the FDA.
Mattress encasements zip closed around the entire mattress, while mattress covers generally cover only the top of the bed. Not only do mattress covers offer limited protection in terms of physical coverage, they may also use thin material which the bed bugs can puncture through.
A bed bug encasement or mattress cover may not be particularly useful in thwarting off an incoming bed bug, but it can be effective to help prevent current populations from flourishing in your household.
In fact, a vinyl mattress cover can help prevent bed bugs altogether. If you've experienced a bed bug infestation in the past, a vinyl mattress cover will help you get rid of bed bugs. It makes it much more difficult for bed bugs to survive, killing them much more quickly.