FFS Two-Sided InStream Fly Box with Lanyard - Easy Grip Foam

This excellent in-stream fly box is two sided and measures 3.75 in x 2.7 in and is a slim 1.4 inches thick (95x68x35 mm). The two hard plastic covers lock tightly with a plastic fold-over clip, and the lanyard frees your hands.

If you're looking for a box that you can carry in the stream with the lanyard hooked either around your neck or through a ring of your fishing vest, here it is. 

This model sports slit foam (see photos). We also carry a slit foam version of the same box.