A thick & cozy, reversible hat to keep you toasty warm.

Size/Measurements: adult small, 21” circumference x 7.5” tall

Materials:
1 ball of worsted weight yarn (approx. 100g)
(I used 80g/160m/175y of River City Yarns Epic Yarn in Green)

5.0mm (US H) crochet hook, or as required for tension
yarn needle for weaving ends
stitch marker(s)

Pattern Notes:

• US crochet terms are used.
• This stitch is worked back and forth, not truly in the round. So you could make it flat then sew it up the side. Or you could do what I do and close each “round” with a slip stitch, then turn and go back the way you just came.
• The stitches you are making are on the opposite side of the work that’s facing you. When you are holding it with the right side facing you, the stitches you are currently making are on the wrong side.
• I only chained 1 stitch to turn (not the usual chain 3 and turn) the nature of this stitch allows for this and a shorter chain makes a better edge.
• When you get to the end of the row, make sure to get the last stitch – it will be a bit compressed and you will have to fiddle a bit to get the hook in the right place (under both back loops).
• You can make a slightly larger or smaller hat by using larger or smaller hooks and/or yarn.

Techniques used:

Double Crochet Thermal Stitch – working double crochet, work the back loop of the current row AND the back loop 1 row below.
I could not find a video showing this the same way that I made the stitch. Here are some great videos of single crochet thermal stitch. For this hat, simply make dcs in place of scs when working into the 2 back loops. Please keep in mind the videos show working into a simple foundation chain and you will be skipping ahead a row because you are working into a foundation double crochet row.

1. New Stitch a Day: Knitting and Crochet Video Tutorials, How to Crochet the Single Crochet Thermal Stitch There is a version by the same person for DC thermal stitch, but he works new rows in the front and draws up tall loops, neither of which are how I did this hat.
2. Beth in Texas (Bethintx1), Single Crochet Thermal Stitch Tutorial

Foundation Double Crochet – this one is much easier to watch than to explain in words. Here are some videos

1. Gleeful Things Double Crochet Chainless Foundation Tutorial
2. Crochet Ever After’s Foundation Double Crochet Tutorial #1: How to FDC
3. Crochet Ever After’s Foundation Single Crochet Tutorial #2: Foundation Double Crochet Tutorial #2: FDC Join In The Round

Please let me know if you have any comments or suggestions. Thanks.