The UPG HD Large Walkabout Fly Box is built with the largest format in Umpqua’s line of fly boxes, giving you plenty of space to store your arsenal of flies. It is equipped with two swing leafs that hold 4 molded and magnetic inserts to ensure you can organize your flies by whatever system you prefer. Multiple swing leafs with HD inserts maintain an impressive grip on all of your flies, from large terrestrials to tiny midges.