This white sunboard is made of PVC foam, which is lightweight but durable. This is perfect for use in a variety of arts and crafts projects, as well as for mounting and displaying artwork, photographs, and other important documents. This white core sunboard is 1/8" (3mm) thick and has a smooth surface that is easy to write on and draw on. It is also acid-free, making it an ideal material for preserving and displaying artwork and other important documents. This sunboard is easy to cut and shape with scissors or a knife, and can be used to create a variety of projects, including picture frames, shadow boxes, and more. It is also an excellent material for use in schools and offices, as it can be used to create bulletin boards, display posters, and create signs and banners.