Crocs are made of a proprietary closed-cell resin material called Croslite, which is primarily composed of polyethylene vinyl acetate (PEVA) . PEVA is a type of polymer, which is a large molecule made of smaller, repeating molecules joined together. The chemical components of Croslite come from fossil fuels. Croslite is a soft and comfortable material that provides maximum cushioning and is claimed to be non-toxic and resistant to odor or bacterial growth. Crocs are not made of rubber, but they are considered plastic because they are made of a man-made polymer. Crocs are not biodegradable and cannot be recycled in local recycling stations because Croslite is made of chemicals that contain elements of plastic, which is harmful to the environment. However, Crocs has taken steps to become more eco-friendly by introducing a new collection of bio-based Croslite material made from byproducts or sustainable waste.