What Our Gearhead(R) Experts Are Saying: "I've been using the Tributary Sling Pack on shorter trips when I don't need a full vest or hip pack. It rides comfortably on my right shoulder, and the streamlined shape keeps line from snagging. There's plenty of room for fly boxes, tools, and an extra layer without feeling bulky." Some days call for a minimal kit and a lot of freedom to move. The Simms Tributary Sling Pack delivers exactly that-a clean, efficient way to keep the essentials at hand while staying out of the way. Built with rugged recycled 600D polyester coated for weather resistance, it shrugs off brush and splash without weighing us down. Inside, a spacious 10-liter main compartment holds fly boxes, leaders, and layers, while a small exterior zip pocket keeps tools and tippet easy to reach. The fully integrated net sheath ensures a landing net is always close, and daisy chain webbing gives us options to clip on accessories. With an ergonomically shaped shoulder strap, adjustable sternum strap, and right-shoulder carry design, the Tributary Sling Pack stays secure and balanced whether we're hiking in or making long casts.