They are 17 microns thick, unlike other bags that are typically 12 to 15 microns, completely leak proof so there will be no messy accidents! This gives you complete peace of mind that the bags are strong enough to do the job! The bags are made using EPI technology and TDPA ...They are 17 microns thick, unlike other bags that are typically 12 to 15 microns, completely leak proof so there will be no messy accidents! This gives you complete peace of mind that the bags are strong enough to do the job! The bags are made using EPI technology and TDPA additive, which means that they will break down in as little as 24 months into just carbon dioxide and water. Premium quality at a great price! Premium quality at a great price!