1. Greater stability in humid environments. Dampness promotes ester foam disintegration.
2. The different raw materials used to manufacture Polyurethane foam usually cost less than those used to manufacture Ester foam.
3. Ester foam’s rough, scratchy surface is usually less desirable than the smoother, softly polyurethane surface.
4. Although both materials are Open Cell, Ester foam cells are generally smaller in structure; therefore they have a tighter airflow. In effect, polyurethane is spongier and more yielding than ester foam.