Soy based expandable foam products are a more eco-friendly option. Derived from soy, and therefore renewable and biodegradable, this product conforms precisely to the shape of your products. This maximizes protection by minimizing movement on the inside of the carton. The product is also very light weight, reducing the additional shipping expense of heavier materials. Realistically expandable foam is best for larger operations due to the space the specialized equipment and process will require.