The Simms Tributary Sling Pack – Bistre
The Simms Tributary Sling Pack is a simple, tough and easy-to-fish-from option for flyfishers who like to keep things streamlined and on the move. Sling it over your shoulder, spin it around when you need access, and get back to fishing without breaking stride.
Built from durable 630D high-density Oxford nylon with a TPU-coated front and PU-coated back, it’s made to handle wet conditions and everyday abuse. The front drop-tray pocket keeps frequently used flies and tools close at hand, with internal and external Velcro® fly patches and two internal mesh pockets for organisation. A large main compartment swallows fly boxes and layers with ease.
Comfort is sorted with a padded, mesh-lined shoulder strap and quick-release buckle for easy adjustment.
| Specification | Details |
|---|---|
| Material | 630D high-density Oxford nylon, TPU-coated front, PU-coated back |
| Front Pocket | Drop-tray pocket with internal and external Velcro® fly patches |
| Internal Pockets | Two mesh pockets |
| Main Compartment | Large compartment for fly boxes and layers |
| Shoulder Strap | Padded, mesh-lined with quick-release buckle |
FAQ
Is the pack waterproof?
The pack has a TPU-coated front and PU-coated back, which provides good resistance to moisture, but it is not fully waterproof.
Can I adjust the shoulder strap to fit different sizes?
Yes, the quick-release buckle allows for easy adjustment of the shoulder strap to fit different sizes and preferences.
Does the pack have any internal storage for small tools?
Yes, it includes two internal mesh pockets for organising small tools and accessories.




Nathan Brown –
I’ve used this pack on multiple trips to remote streams. The padded shoulder strap is comfortable even after long hours of fishing. The drop-tray pocket keeps my flies within reach, and the mesh pockets help me stay organised. It holds my fly box and a few essentials without feeling bulky.
Gavin Short –
The pack feels sturdy and durable. The coating on the front and back handles wet conditions well. I appreciate the quick-release buckle—it makes it easy to put on and take off. A little room for improvement in the internal pocket size, but overall very functional.
Charles Slater –
I love how simple and lightweight this pack is. I can sling it over my shoulder and move without any hassle. The organization is great, especially with the Velcro patches for flies. It’s perfect for day trips and backcountry fishing.