PREDATOR FLY BOX MEDIUM S81Predator Medium Fly Box S81 The Predator Medium Fly Box S81 is a versatile, double sided fly box designed for anglers who need dependable storage with enhanced fly protection. Featuring silicone wedge inserts on both sides, it offers superior grip while being gentler on hooks and materials, helping extend the lifespan of your flies. With its medium sized profile and increased depth, the S81 provides ample storage capacity for a wide variety of fly