Screenshot Ken Norberg November 12, 2024 1 View EcoCosy® is Sateri’s flagship brand for its viscose rayon fibers, made from wood cellulose from sustainably-managed plantations. It’s soft, comfortable, breathable, absorbent, and biodegradable. EcoCosy® is Sateri’s flagship brand for its viscose rayon fibers, made from wood cellulose from sustainably-managed plantations. It’s soft, comfortable, breathable, absorbent, and biodegradable.