Planet Friendly Materials features: Tencel, a fiber made from sustainably sourced wood that is created via an environmentally sustainable process. This mattress also features Cellpur foam, an environmentally friendly foam that is made with Tencel fiber. Layer 1: The Rubenite Mattress features a washable cover made from Tencel fabric, making the mattress extremely soft to the touch, durable, and easy to clean. The breathable and moisture-resistant Tencel fabric aids temperature regulation, keeping you comfortably cool while you sleep and guaranteeing you will never wake up in a sweat. Layer 2: Some may argue that a good night’s sleep isn’t exactly rocket science, but in this case, it is! Developed by astrophysicists, our Cellpur cooling memory foam layer molds to your body, distributes your weight, and relieves pressure while also being breathable and dispersing your body heat, allowing you to wake up feeling rejuvenated and refreshed.