Quill Foam Board are foam cored sheets covered with brightly coloured paper | Foam board is suitable for mounting, backing boards, signage and many art and craft projects | Made from quality foam which is covered in paper so you can use it with markers, glues and other common art and craft supplies | Each sheet has a thickness of 5mm so it is strong and sturdy | Thick, foam construction making it ideal for various artistic activities | Can be cut down to shape if needed | Acid free