The Wild River Multi-Tackle Large Backpack features a lower tray compartment for storage of up to four #3600 style trays. In addition, large upper storage area with removable divider, which can convert the bag to a full size backpack for holding of larger items. A front pocket that folds down to provide a handy work surface. Large adjustable padded shoulder straps with sternum strap for all day comfort. This backpack holds up to six #3600 and four #3500 style trays.