http://pastport.jp/user/jhwantu/timeline/Features%20of%20Gold%20Colored%20Table%20Mats https://www.jhwantu.com/products/jh8003-gold-vinyl-placemat/Table mats are mainly made of synthetic rubber mixed with anti-static (conductive) and dissipated materials.The commonly used 2 mm composite structure is double-layered with a 0.5 mm surface of t ja-JP