The Umpqua Medium UPG HD Box has see-through lids and magnetic swing leaf inserts will keep you organized while planning your trip while the Class 3 water resistance and bombproof construction will keep your flies safe on the river. This fly box is Umpqua's most versatile box and will carry a wide range of flies and nymphs with the 3-D molded high-grip FlyTrapTM storage system.