Umpqua UPG Heavy Duty Fly Box - FlyTrap High Capacity Storage with TPE 3-D Molded High-Grip Inserts makes the Heavy Duty Fly Box the go to choice for maximum storage in a waterproof design. The 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 versatile box will carry a wide range of dries and nymphs with Umpqua's 3-D molded high-grip FlyTrap storage system. Single Two-Sided Magnetic Swing Leaf Insert Configurations: TPE Standard-Standard See Through Lids Waterproof