The IMP BL from MRFC is a nymph tied in size #14. Size #14 covers the naturals trout encounter most often.
Euro nymphs are slim and heavily weighted to sink fast on a tight-line rig. Fish it as an anchor or dropper, staying in contact with the flies through the entire drift. Carry it in a couple of weights to adjust to changing depths through the day.
The barbless hook makes for quick, clean catch-and-release.
