The Pure Rejuvenation Pillow uses a Tencel Fabric Cover to wick moisture away while you sleep, keeping you cool and clean all night long. It’s easily removed for washing (follow washing guidelines). Inside the Tencel cover is the Bio-Visco foam infused with aloe-vera. Small holes in the pillow allow for consistent airflow and temperature regulation. The aloe serves as a microbial deterrent to keep your pillow free of dust mites, mold, and microbes. Ideal for stomach and back sleepers, the pillow offer optimal orthopedic positioning for your spine. The Bio-Visco foam density is 121 lbs per square foot preventing breakdown or hardening in your pillow.