Eco Living Friendly Evolon Allergy Mattress Protector | 9" Queen Zippered Mattress Encasement | Dust Mite, Bed Bug, and Allergen Proof Cover Evolon Non Woven Polyester Fabric Made in USA and Imported Made in the US and made of Evolon. The award winning German engineered Evolon offers 1 micron filtration using a microfilament technology, creating a physical barrier against allergens. Evolon is made using an eco-friendly process and because of its large internal surface area, it can absorb 400% of its weight in water and dries very quickly. This breathable fabric is not coated, and it has no PVCs and no chemical post treatments, so it is totally breathable. The fabric is rustle-free, comfortable, and has no "plastic" feeling. Sleep Safe ZipCover Evolution mattress encasement provides total bedbug, dust mite, dander, and allergen protection making it ideal for allergy sufferers. Totally machine washable even with non-chlorine bleach and wash tested at 500x for durability. Wash prior to use for ultimate softness as the fabric naturally softens with each washing.