Umpqua Boat Box UltimateThe Umpqua Boat Box Ultimate is the mid size version of Umpqua's drift boat fly box series the right balance of capacity and portability for guides and float anglers who carry a full hatch selection. Slotted foam on both the top and bottom lids holds flies securely, while the external slotted foam sheet lets you dry, stage, or quickly swap flies without digging through the box mid float. Internal slotted foam on top and bottom lids high capacity