Extremely water repellent heavy duty latch and O-ring seal. Models M-66, M-660 and M-67 have good applications for bonefish fishermen where flies are small and the fly selection is small. These boxes will also appeal to the mountain stream trout fisherman. Once again the flies and selection are small, but the hazards to the collection getting wet and damaged is extreme, especially if wet wading. M-66 and M-660 have 14-Compartments with individual snap lids to keep your flies secure and well organized. Two sizes of compartments will fit flies up to #4.