These 42 Gal. clear contractor bags may be transparent, but they're the farthest thing from fragile. The 4 mil thickness of superior low-density plastic is as tough as nails: tougher, actually, because these bags resist punctures and tears even when stuffed with rough construction debris. Whether you are completing a demolition, cleaning up the yard after a heavy storm, or removing the remnants of a renovation, these bags are an excellent choice. Clear bags are great on site, allowing you to see exactly what's being disposed of and avoiding costly mistakes. The flat seal helps these heavy-duty contractor bags to stand up on their own, but they are also a good fit in standard outdoor drum cans. Material: Polyethylene.