Here's my favorite standard caddis adult imitation. I use it anywhere I might have used an elk hair caddis in the past, and for me, it works very well under most conditions. An elk hair caddis is primarily for use in riffles and runs, and although it may work from time to time on flat water, it isn't the best choice. This pattern has worked well for me in every water type trout habituate, even lakes. The caribou hair wing provides an excellent profile, while also being supple and very buoyant. The only floatant you will need is Frog's Fanny after a fish or two, to dry it out.
Hook: #10 - 18 Std Dry Fly
Thread: 6/0 Olive Danville (use what you like)
Abdomen: Haretron - Here I use light olive brown. I also tie them in olive/green, tan, cream and gray.
Underwing: Clear zelon
Wing: Natural caribou body hair
Thorax: Hare's ear - touch-dubbed
Tie some up and fish them with confidence.
And sharpen your hooks!