Planet Organic Slippery Elm Max 65g Planet Organic $14.95 Default Title - $14.95 Quantity This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available. Slippery Elm is the inner bark of Ulmus Fulva, an elm native to North America. It is known for its high mucilage content, and hence is high in soluble fibre. Planet Organic slippery elm is a soothing, easily digested beverage.