1) Single loop - Flat - 4 panel 2) Two loops - Closed - U+2 panel 3) Four cornered loops - Spout discharge - Circular with reinforcement ... The Jumbo bags have lining options like Lamination coating, Liner glued, tabbed, loose inserted to avoid leakage and moisture. Baffles are provided for maintaining stability. Filler Cord for dustproof. Lables and Pouch option is also available. Wooden pallets bailing.