http://pastport.jp/user/jhwantu/timeline/The%20Classification%20of%20Hard%20Table%20Mats https://www.jhwantu.com/products/hard-pvc-placemats/What's a table mat made of? The hard table mats serve to protect the dining table.Materials of mats differ, so as their duties.Which one is preferred for hard table mats?1.The Silicone Table MatCommon ma ja-JP