Contractor grade — thicker gauge, larger volume, and a completely different silhouette from a household sack, which is the reason to own both. This one is overfilled. The tie is straining, the neck is pulled taut above the load, and the body is distended into the flat-sided shape a heavy bag takes when it has been set down and left. That shape does a specific job: it implies something with weight and corners inside, which a soft, rounded bag does not. The surface shading is deliberately less translucent than the lighter sacks in the set — heavy-gauge polyethylene reads closer to opaque, and matching all four bags to one material would have thrown away the variety they exist to provide. Built to sit alongside the other three refuse models in the Street Level pack, weathered to the same level so a pile of them reads as one location rather than four separate purchases.