Keep the ears of the ones you love warm! The diamonds may be worked in Stocking stitch or Reverse Stocking stitch for added texture. The extra-warm, interconnected, two-layer fabric is made with a basic double-knitting technique.
If you would like a hand with this project, please see my companion Tutorial, The DK Hats.
See my YouTube Video, Simulated In the Round Swatching Technique to get you started!
This model is shown in Drops Merino Extra Fine (Solid) with Noro Kureyon.