With a crystal clear, durable polycarbonate lid, this waterproof fly box fits in a vest or jacket pocket and has a long-lasting, self-healing silicone insert. Our silicone fly boxes feature an easy new guide system, allowing flies to be more easily inserted and removed with out sacrificing a secure hold. The silicone is molded in one process with one die, increasing its durability and life over traditional foam boxes and cut silicone. Other features of the box include stainless steel hinge pins and a flush latch that won't catch when sliding into your pocket or bag. Just over 1/2 inch thick, the large box has room for 120 flies and the medium can fit 77 flies.