Foam and Function In a joint venture with StreamWorks, C&F; Design has introduced an innovative new line of fly boxes and accessories. All boxes in the waterproof fly-box series (shown) feature a patented microslit foam that holds the bend of the hook instead of the point, plus an airtight seal, provided by a recessed gasket with a positive latching system. About $31$38. The entire C&F; collection is available exclusively through StreamWorks dealers. % 800-437-3697 for the dealer nearest you