Devaux Tungsten Nymph Fly JBNT 31-B

Devaux Tungsten Nymph Fly JBNT31-B: the union of French craftsmanship and innovation to revolutionize your fly fishing experience. Designed to tempt the wariest fish, this nymph offers remarkable versatility, effectiveness and realism, setting a high standard for anglers seeking their next record catch.

Forged from the expertise of Maison Devaux, the JBNT31-B nymph stands out with an optimized design that guarantees improved performance in all conditions. This flagship product, the result of years of research and testing in varied environments, perfectly meets the needs of modern anglers, amateur and professional alike, and is already a reference in 2025.

Technical features:

• Weighted tungsten body for rapid sinking


• Hand-tied for finesse and discretion


• Premium hook offering optimal penetration


• Careful finishes ensuring maximum realism


• Suitable for both river and reservoir fishing

The Devaux JBNT31-B nymph stands out for several key points: its precisely calculated density allows it to reach the bottom quickly, where the biggest fish lie. Thanks to a tungsten body, penetration through the water column occurs naturally, encouraging trout or grayling to strike without suspicion. The superior quality hook significantly reduces the risk of losing the fish during critical moments of the fight. Additionally, the ultra-realistic finish, with meticulously worked details, fools even the most cautious fish by perfectly imitating the natural prey in their environment.

Benefits and highlights:

• Realism and mimetic effect: enhanced attraction thanks to an authentic and appealing visual.


• Consistent performance: adapts to all current types, from fast runs to calm water.


• Ease of use: immediate handling, even for less experienced anglers.


• Durability: materials and construction designed to withstand many intensive fishing trips.


• Compatibility: works with a wide range of leaders and rigs.

To get the best out of the JBNT31-B nymph fly, use a discreet, fine tippet to enhance the natural drift. Experienced anglers will favor a tight-line nymphing rig, a perfect technique to feel the slightest take thanks to the tungsten density. On heavily pressured beats, pairing the JBNT31-B with a long leader will increase its attractiveness while minimizing fish suspicion. Highly effective on trout, grayling and other salmonids, this nymph performs well from early season to peak summer activity, when fish become selective.

“I had the chance to test the Devaux JBNT31-B from its 2025 release. Its ability to drop immediately into the water layer where the big trout hold allowed me to break several records on beats known to be very difficult. Its realistic look and the quality of the hook really make the difference on delicate, subtle takes. I recommend it without hesitation to all fly fishing enthusiasts.” – Maxime M., expert angler.

FAQ and additional information:

• Can I use this nymph for all types of fish? The JBNT31-B is ideal for trout and grayling but may occasionally attract other salmonid species.


• Is the nymph suitable for reservoir fishing? Yes, its density and perfectly realistic finish also perform excellently in reservoirs on educated fish.


• How can I maximize its longevity? It is recommended to rinse the fly after each outing to preserve materials and the hook point.

With the Devaux Tungsten Nymph Fly JBNT31-B, prepare to elevate your fly fishing practice to new heights by combining technique, discretion and efficiency for results that exceed expectations.