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.