This 45 gallon Lavex Li'l Herc medium-duty black 1.2 mil-thick low density garbage bag is made of recycled plastics and resins which make it economical, versatile and strong. Low density garbage bags are more stretchable and give more easily than high density bags, because they are made from resins that are resistant to puncturing and tearing. Low density garbage bags are also comparatively thicker than high density garbage bags.