Hook: Any dry fly, this is a Partridge Roman Moser Barbless #12
Thread: Any to match dubbing, I've used UTC 70 Olive
Dubbing: Seal fur, SLF whatever takes your fancy.
Wing: Deer Hair
Head: Foam
Start thread and wrap down to bend.
Dub thread, bright green for egg sack first then whatever colour your caddis are (The caddis on the Welsh Dee are dark olive).
Wrap dubbing to about the 2/3 point.
Take a pinch of deer hair and even the tips in a stacker.
Measure to size and trim the butts.
Tie in with the tips facing back using the pinch and loop method, don't tie too tight as you have to manipulate the hair next.
Rock the hair between finger and thumb to spread it evenly around the top half of the fly.
Now tie down butts tight and tie in a piece of foam just behind the eye.
Leave the thread at the eye and dub, I've used Olive Mosiac here because I like a bit of sparkle in the thorax.
Wrap dubbing back over hair butts to start of wing.
Bring foam over to make thorax cover and tie off, whip finish at same point.
Stretch tag of foam and snip with scissors. Job done.