Coat Hangers (Wood) Special Instructions Made With Treated Wood Wooden clothes hangers are made with varnish to avoid splintering. Learn how to dispose of treated wood. Did You Know? Eco-Friendly Hangers Since most hangers are nearly impossible to recycle, some companies have begun working on more eco-friendly hangers. Take Ditto Hangers, for instance, which created both paper and easily recyclable plastic hangers to replace traditional hangers.