Key Features: Constructed out of water-resistant nylon, the Portage Backpack features a customizable front-loading design capable of holding up to (5) 5000 series Tuff Tainers in the main compartment. The combination of heavy weight materials, foam and polyethelene panels provide unsurpassed protection. Attach the P40S Portage Sling to the front to make this the ultimate co-angler or shoreline bag