Once you get to 1.5 Mil thickness you’re really entering the realm of thick garbage bags. These heavy duty garbage bags are made from Linear Low Density resin, known as LLD for short. The special properties of this plastic mean that the bags made from it are really strong and stretchy, able to resist punctures from even sharp and mean trash with jagged edges. Low density trash bags at this thickness are very popular, both as at-home garbage bags and as commercial garbage can liners.