I’m generally pretty skeptical about “fly box innovations,” but this one is legit. It’s made with a slit-silicone insert, rather than regular foam. What that means is that it is less apt to stretch and wear out as you pull and replace flies in the box. The material has virtually no memory, so every fly is always snugly anchored. (Really… you need to check it out, but there is a noticeable difference.) It’s sized right at 7” x 3.5” x ¾” so it slips comfortably in pockets. It has magnetic closures to keep it bound shut, and it’s made of polycarbonate that’s shatter resistant (the same stuff that many polarized lenses are made of). It holds 168 flies. And it is temperature tested to 250 degrees F. For more information, please see www.tackyflyfishing.com.