U-Type Inner Stretch Big Bag, the Circular Bag is made from fabric woven on a circular loom, which is then cut to the proper length for a specified bag height, thereby eliminating the vertical seams on each of the bag’s sides. The tubular body design is ideal as a linerless option for fine and hygroscopic materials. It is also an excellent alternative to the original four-panel bag construction. A U-Panel bag Also called U-Type Inner Stretch Big Bag is a bag produced from a square or rectangular canvas (Discharging chute in our case) where 4 panels are sewn on each side. Then Panels are sewn in right angles forming a U allow you to charge it safely. 4 Standard loops are added on the top directly on the angle or each side sewn on canvas panels of 160 gr/m.