Simms Tributary Sling Pack - Tributary Sling Pack is the easy wearing, sized-right storage solution for productive days on the water. Rugged and durable 600D recycled polyester shell fabric with 200D polyester liner Lightweight and simple construction mimics Freestone Sling without ambidextrous functionality - right shoulder only. Streamlined, smooth exterior makes for minimized line catch and less bulk Large main compartment, small zippered exterior accessory pocket Fully integrated net sheath with daisy chain webbing for utility leash attachment Fully functional and ergonomically shaped shoulder strap with tool attachment port and adjustable sternum strap FABRIC TECH: 100% Recycled 600D Polyester with backside PU coating and face DWR treatment; 200D Polyester Liner