See our other depth covers 6", 7", 8", 9", 10", 12", 14", 16" Made with 100% Certified Organic Cotton, Global Organic Textile Standard (GOTS) fabric, organic cotton allergy proof covers. The most natural product available for dust mite protection with the tightest microns (4.5).  100% organic means you and your family are not being exposed to any harsh chemicals or toxins. No Chemicals, dyes or any added treatments whatsoever have been used on the covers. Reat assured that dust mites and other allergens cannot pass through this covers to bother you or your family.  What we do know is that some research shows that allergy-causing molds and fungus are sometimes found on pillows – especially those with synthetic fibers.