Hi Jan, glad you like the hat, even if you do think it’s not double-knit lol. It is tubular double-knit, which produces a tube on straight needles and which is considered to be a kind of double-knitting. I am in a double-knitting Yahoo group where tubular double-knitting is accepted as one of the forms of double-knitting.
Have a great new year with lots of knitting success!
Gillian