The traditional material for wallets is leather or fabric, but many other flexible flat sheet materials can be used in their fabrication. Non-woven textiles such as Tyvek are used, sometimes including reuse of waterproof maps printed on that material. Woven metals, such as fine mesh made of copper or stainless steel have been incorporated into wallets that are promoted as having electromagnetic shielding properties to protect against unauthorized scanning of embedded RFID tags. Do-it-yourself websites such as Instructables feature many projects for making wallets out of materials such as denim, Kevlar, or ductape.