This box features impact resistant Polycarbonate case and lid with latch and o-ring to keep it sealed shut. The self healing silicone insert is not absorbent and has 121 triangle slits for your flies. It’s the perfect bugs to hold a healthy assortment of flies for a day trip. Or load it to the gills with your favorite streamers. Either way, you’ll be glad you rockin’ the SA box on your next trip!