Yarn: Malabrigo "Rasta", or another bulky yarn to get gauge.
Needle: size 15 circular needle, 16" long
Gauge: 2 stitches per inch
Stitches:
Double Twisted Rib (see attached for instructions)
k2tog: Knit two stitches together
____
Pattern:
Cast on 40 stitches. Join, being careful not to twist yarn.
Knit 26 rounds in Double Twisted Rib
Row 27: *knit 6 stitches in double twisted rib pattern, k2tog ; repeat to end of round (35 stitches remaining on needle)
Row 28: *knit 5 stitches in double twisted rib pattern, k2tog, repeat to end of round (30 stitches remaining on needle)
Row 29 *knit 4 stitches in double twisted rib pattern, k2tog, repeat to end of round (25 stitches remaining on needle)
Cut yarn, leaving a 10 inch tail. With a tapestry needly, run yarn through remaining 25 stitches and pull tight. Tie off.
Sew in yarn ends at beginning and end of hat.