I used the Very Warm Hat pattern from EZ’s The Opinionated Knitter. Fast and easy to knit; I loved adding the second layer to an otherwise plain hat.
The black outer layer is Knit Picks Swish Superwash and the lining is Main Line, a cotton/wool blend. I found the black Swish superwash a little “squeaky” and slick feeling which surprised me because I have used other colors of this yarn with no problems. Maybe it has something to do with the black dye on superwash yarn?
Anyway, I used almost the entire ball of the Swish, and a little less of the Main Line. My gauge was tighter with the Swish, so I had to adjust the number of stitches slightly when I added the lining.