The Naturally Fresh Cat Litter is an eco-conscious clumping litter made from all-natural walnut shells. Walnut shells have the unique ability to control ammonia odors, meaning Naturally Fresh neutralizes odors organically without relying on harsh perfumes. Naturally Fresh is sustainable, non-toxic, and free of harmful silica dust. Annually renewable, your walnut shell applications are protected from supply chain bottlenecks. About the Brand Eco-Shell was founded in 1995 to provide clean, non-toxic, environmentally safe walnut shell products to an array of industries. Eco-Shell is one of the premier suppliers of walnut shell media to industrial markets around the world. As a result of having a substantial in-house raw material supply partner, Eco-Shell is capable of entering into long-term contracts and can ensure a consistent supply without interruption.