The Elk Hair Caddis is an adult sedge imitation. Fish it singly on a long fine leader either static or twitched across the surface.
Take the thread down the hookshank to a point just past the barb. Catch in a brown cock hackle. Dub the seals fur onto the thread to create a rope. Create a level body up the hookshank to a point just below the eye, leaving enough room to tie in the wing.
Wind the hackle back up towards the eye (palmered style), tie off at the eye and trim waste.
Take a bunch of elk hair and even the ends using a "hair stacker".
Catch in the elk hair and secure, trim the waste ends to create a neat head.