There can be no arguments about this: 516 flies is an absolutely absurd amount. If, however, you need to store that many in one place, the Special Dry 516 is the right fly box for the job. With pre-slit foam sized for midges on one side and larger dries on the other, the Special Dry 516 will hold all of the dry flies you’ll need for a day on the water. Or a week on the water. Maybe even a month on the water.