Incredibly realistic mayfly larva. The majority of time, trout and greylings are feeding on nymphs. Check some stone to identify the size and colour. If they are small and dark, this fly will be perfect!
J:son nymphs are soft and flexible, with lifelike silhouettes that replicate real insects in the water.
- J:son size: 5
- Length: ca. 12 mm
- Colour: black
- Hook size: 18