That kind of flies I have loved for years, are simply to tie and very effective then we fish under the surface (similarly like wet fly - my favourite method).
Tie this fly if you want to catch brown trout.
Hook: Hanak H300BL no. 14
Thread: Veevus 16/0 gray
Body: Hare's Ear Plus Dubbin Rusty Orange + UNI Glo Orange tinsel
Hackle and Wing: CdC