Shop for Volara® Foam Sheet. In stock, ready to ship. Volara® is a closed cell polyethylene foam that is used to line the inside of braces to give greater comfort to the patient. Volara® is available in a low density, low stiffness grade (four pounds per cubic foot) and a high density, high stiffness grade (ten pounds per cubic foot). Available in custom lengths. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.