These bags are 1.2 Mil thick, making them the lightest of our heavy grade low density garbage bags. They are manufactured with high quality plastics. The type of resin used in these bags is Linear Low Density resin. If you’re feeling friendly you can just call it LLD. The benefits of low density trash bags lie in the resilience and toughness of this material. Its stretch and strength make it resistant to punctures even with sharp or pointy trash.