The cap is knit flat and sideways and is reversible. You may choose your favorite side before sewing the back seam. Knitting this cap with a plain yarn of one color shows the knitting pattern best. This pattern makes a nice lightweight, warmer weather chemo cap when knit with DK yarn. Do not use a thick (bulky) yarn for this pattern.
From Flor at Head Huggers.
Find the free pattern here: link