These fly boxes are made in the U.S.A., and designed to be tough and durable. From the strong ABS blended plastic outer shell that is impact resistant and can take falls on hard surfaces to our silicone inserts that outlast and outperform foam. Our silicone inserts can always be used as a non-slit insert and will not tear like foam, our slit models are easy to use and securely grip large and small flies ensuring that they stay in place until you want to tie them on your tippet. The Brook Box will go the distance and protect your flies along the way. Available in slit and non-slit inserts.