Plastazote® #3 is often used as the supportive filler on the base layer of foot orthoses. Allows for the construction of lightweight but rigid splints and orthotics. New, convenient, easy-to-store, stay-clean cases are the better way! Available in sheets or cases. Sheets are black, 27" x 41". Case amounts are boxed in flat, 3" (7.5cm) thick boxes to protect and store your Plastazote.