Switch Back is fully reversible, and looks really complicated, but is super easy and fast to make.
You have the option of 6 sizes Swtich Back can be knit in an evening, usually less.
This is written and charted out.
I recommend wool, so this will block properly.
Super Bulky (5-6 wpi) ?
8 stitches = 4 inches
US 15 - 10.0 mm
45 - 180 yards (41 - 165 m)
Cowl(Small, Medium, Large, XL, Mega)