Bottom bags, also known as open-seam sewing machine bags, have a bottom sewn together with special sewing thread using a sewing machine. They are easy to open, have a simple overall manufacturing process, and are suitable for mass production enterprises.

Sewn-bottom bags, also known as open-mouth sewn bags, have their bottoms sealed with special thread by a sewing machine. They are easy to operate when unpacking, and the overall production process is simple, making them suitable for manufacturing enterprises with large production volumes.