Builder bags are top-quality bags mainly used for heavy-duty. Builder bags have a safe working load of at least 1000 kilos. They can be used as aggregate bags, bulk bags for sand, and bulk gravel bags. These bags have four lifting loops. Fully certified builder bags have a safety factor of 5:1. They are reinforced with hem at the mouth by most quality producers.
They are mainly divided into three types in the market. The premium type is the costliest. It has a dimension of 90cm cube and weighs 135 gm. The budget grade occupies a volume of 85 cm cube and has a weight of 120 grams. The third type is known as mini-bulk bags. They have a volume of 70 cm cube and weigh comparatively less than the other two types.