Spacious Main Compartment holds up to 4 full-sized fly boxes; Secondary Compartment accommodates 2 full-sized fly boxes; Internal Pockets organize leaders, tippet, indicators, and more; Easy access slot for your fishing net; External Fly Patch for quick access and fly drying; Additional Stretch Pockets for easy-access storage options; Proprietary VersiLoop Accessory Attachments are compatible with Umpqua's 6-pc accessory line