This yarn came from my grandmother's stash and was unlabeled. I am not sure what its official weight or fiber content is, but it is slightly stretchy and seems to be a heavy worsted-weight yarn. It is comprised of synthetic strands of ecru and brown and an elastic strand of black. It has a texture similar to readily-available boucle yarns.
Cascading Keyhole Scarf
Guage: 11 st = 4 in
Yarn: just over 2 50g balls of worsted weight yarn
Hook: Size J
A NOTE ON GAUGE: Several people who have made this scarf have found that their scarf ends up shorter than mine. It is a simple matter to increase the number of stitches in your starting chain, though this may alter the placement of the keyhole. Again, the yarn I used was unlabeled, so it is entirely possible it was aran weight rather than worsted. It's probably a good idea to check the length after the first or second row just to make sure it's what you want.
Row 1: sc in 2nd ch from hook and in each ch across. (96 sc)
Row 2: ch 2, turn. hdc in same st, hdc in next st, (2 hdc in next st, hdc in next st) across. (144 hdc)
Row 3: ch 3, turn. dc in same st, dc in next 2 st, (2 dc in next st, dc in next st, dc in next st) across.
Row 4: ch 4, turn. tr in same st, tr in each of the next 3 st, (2 tr in next st, tr in each of the next 3 st)
until 56 st away from end, ch 6, sk next 6 st, resume pattern (keyhole made). (240 tr)
Row 5: 2 sc in each st across. (480 sc) Finish off. No edging.