One of my favorite patterns. Infinity scarfs are now my new favorites. Used the exact same yarn - lion brand tweed in "woodlands". My son like it so much he wanted one. Also made it in lion brand tweed - "caramel" too. Have made 4 so far. Friends love it! Takes about 2 hours once you learn the pattern. Easy beginners scarf!
What if you knit instead of purl -- would you get shetland lace? This alternates R and L decreases for less diagonal pull in the lace. Rows 1 & 3 (WS): Purl Row 2: k1, *yo, k2tog; rep from * Row 4: *SSK, yo; rep from * across, end k1 Rep these 4 rows.