IPX 6.5 Waterproof rating (1m of water for 20 mins; Dustproof); Secure latch closure; Magnetic swing leaf's; Bombproof shell; Ideal for a wide variety of flies sizes 8-26; Unique storage areas for different flies; Magnetic Fly Dock for small flies and drying or staging flies; Fly Trap - for offset head to tail storage of flies sizes 8-16; Micro Slit - for compact organization of small flies sizes 16-20; Lightweight - 25% lighter than Silicone counterparts