We got a great question from Facebook recently. A Mom wanted to know which type of cover was best for the control of dust mites; the dust mite proof covers with a membrane or the membrane-free dust mite proof covers.
Now this is a Mom that was on the ball, she had already figured out that dust mite proof covers fall into two broad categories. First are the coated fabrics, these are the normal, everyday fabrics that are coated to make them resistant to dust mites and bed bugs. These are the dust mite proof covers with a membrane. We carry two of these sorts of fabrics. Both are coated with a one millimeter thin urethane membrane. This membrane is heat sealed to the fabric to make a lasting bond. Because dust mites and bed bugs can’t penetrate the urethane backing, this makes a cover that is completely resistant to allergens. In addition, moisture can’t penetrate the membrane so this type of cover gives waterproof protection as well. The downside to this type of material is that while it is water vapor transmissive it can still be warm.
The other category of fabric are the microweaves. These fabrics are created by tightly weaving the fibers to create a fabric where the average pore size is so small that allergens cannot penetrate the fabric.. The upside to these fabrics is that they are thinner and thus cooler than the membrane fabrics. The downside is that they are much more expensive as it takes a lot of yarn to weave fabric that tight. Also, only the strongest fibers (such as polyester) can be woven extremely tight.. So, if you are a cotton lover, you have to give up some pore size to get an all cotton fabric. If you decide on a microweave, you want a mean (average) pore size of at least 8 microns.
Whether you decide on a fabric with a membrane (like our Linen) or a membrane-free fabric like the Pristine Luxury, all of our zippered mattress covers will give you complete protection against dust mites, molds, pollen, animal allergen and other common household allergens. It is just a matter of personal preference and budget.
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