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