Little bit of foam and elk; floats low, floats a long time. Tied here in salmonfly colors; change to suit your needs.

hook - Mustad 79580 #2
thread - UTC 140 hot orange
body - 2mm foam dark brown
abdomen/thorax - dubbing rust/hot orange rabbit
wing - elk hair
indicator (optional) - 2mm foam orange
legs - rubber medium brown

Part 1

taper foam strip (hook gap wide) to create tail (a little longer than hook gap) and poke a hole at base of taper, mash barb and slide on hook

attach thread at head and wrap back to bend

brush a bit of Super Glue on inside of foam, then 1 soft loop, pull slowly but firmly (to keep from cutting the foam) to create first segment

wrap thread forward to expand first segment

dub thread, dub segment

pull foam down, advance thread to next segment location (approx 40% mark)

create segment with thread wraps