Here's how I did it - I'm not a very professional pattern writer, so comment away if you want to try this at home and have no idea what I'm trying to say.
needles: 16" circ in 3s and 5s
yarns: CC - Noro Silk Garden (the neutral one) and MC - Mini Mochi (I have no idea what colorway this is). one skein each (with leftovers of both)
one stitch marker
I didn't work a gauge, but the 5 row repeat was about 3/4” for me on the larger needles.
total length: 10”. circumference ~20”.
CO 144 sts (or another multiple of 18) in CC with larger needles (or even larger, if you cast on tightly like I do), place marker, join w/o twisting.
knit 1 row and purl 1 row in CC (to create a garter ridge, to try to keep the thing from curling up).
join MC, knit 1 row, purl 1 row, knit 1 row.
next row, begin chevron pattern below.
continue to a couple inches short of desired length (i did 15 repeats of the 5 row pattern).
change to smaller needles (i did this to change the gauge enough to make the cowl stay up around my nose when it’s cold).
work pattern twice (10 rows)
work the pattern row (row 1) of the chevron, then purl 1 row CC (this will create a row of garter stitch instead of stockinette). work 1 garter ridge of MC (k 1 row, p 1 row), another of CC, and bind off w/larger needles.
row 1: w/CC, k2tog 3 times *kfb 6 times, k2tog six times* repeat to six st rem, k2tog 3 times.
row 2: w/CC, knit
rows 3-5: w/MC, knit
[i knitted three rows of mini mochi because the yarn is a little thinner than the noro and i didn't want the color to get lost]