Midgar Salmon Irons; Micros. These fiies are extra light dressed salmon / sea-trout / trout flies. For the salmon and sea-trout these flies produce particularly well during low water conditions from middle to late season, and for the trout the flies can be used during the whole season. Midgar Salmon Irons; Micros are tied on Partridge Double Nymph Hooks from size 10 to 16.