Devaux Tungsten Nymph Fly JBNT 31

Devaux Tungsten Nymph Flies JBNT31: discover excellence in fly fishing with this model designed to deliver performance and versatility on every river or reservoir outing. With meticulous design by the renowned French brand Devaux, the JBNT31 nymph addresses demanding anglers seeking a reliable solution to fool the wariest fish.

The JBNT31 combines fineness, realism and effectiveness thanks to a careful selection of materials and the placement of a specific tungsten weight. This type of fly lets you explore all water columns and achieve natural drifts in any conditions, regardless of current or depth.

• Body carefully tied to perfectly mimic aquatic larvae


• High-density tungsten weighted head for fast descent


• Universal use: rivers, torrents, reservoirs


• Ultra-sharp hook to ensure solid hookups


• Maximum resistance to abrasion and repeated strikes

Performance gains and key benefits: the Devaux JBNT31 nymph impresses by its ability to quickly reach the targeted water layer thanks to its perfectly balanced tungsten weight. Its realistic silhouette triggers the instinct of educated trout and other salmonids. Built for increased longevity, it remains effective after multiple casts, even over snaggy bottoms or in strong currents. Its versatility allows successful use across a wide variety of habitats, increasing your catch rate and enhancing every fishing session with memorable catches.

To get the most from the JBNT31 nymph fly, favor rigs mounted on a thin weighted head or a drop shot. Ideal for tightline nymphing, it also adapts perfectly to Spanish-style or Czech nymphing techniques. Use it as a point fly or on a dropper to cover all water levels effectively and prospect current seams. Pair it with discreet fluorocarbon tippets and vary drift speed to optimize takes, even on heavily pressured rivers.

"I have been using Devaux JBNT31 nymphs since their launch in early 2025: their effectiveness on the trout in my favorite rivers is impressive. The realism of the imitation, the sink rate in deep water and the fly's durability clearly make the difference, even on the most fished beats" (Jean-Baptiste Lebrun, fishing guide, March 2025).

FAQ and additional information:

• When should you use the JBNT31? Ideal in spring and summer during strong hatches, but deadly year-round, even in cold water.


• Is the JBNT31 suitable for beginners? Yes, its ease of use and versatility make it a highly recommended fly regardless of experience level.


• Can it be rigged in tandem or with other nymphs? Absolutely, the JBNT31 pairs effectively with other patterns to cover all water strata.

In summary, the Devaux Tungsten Nymph Flies JBNT31 stands out as a benchmark for demanding anglers looking to optimize every cast with a technical, robust and high-performing fly. Invest in this proven model and maximize your chances of success in rivers and stillwaters.