Easy One-Skein Slouchy Knit Beanie

Materials:
1 Skein Caron SHEEP(ISH) Vickie Howell Yarn in Olive(ish)
alternative: any 30z/85g medium weight yarn of approximately 167yds
1 pair of size US5 (3.75mm) double pointed needles, or equivalent circular needle

Abbreviations:
CO= cast on
PFB= purl1 into the front and back of the next stitch to increase by 1 stitch
K2tog= knit two together