The kit has a great handpainted worsted weight yarn and kid roving dyed to coordinate.
Thrummed mitts are actually a Canadian thing. They have been around for a few hundred years in Northern Newfoundland and Labrador. Bits of fleece were added to the inside of knitted items to add warmth.
After several false starts (a.k.a. frogging), I finally settled on a technique to make the thrums and to thrum a stitch by following the instructions from Biscotte and Cie.
Another great tutorial can be found on Hello Yarn but I did not follow that technique to knit the thrums.
I found that it's best to make a few dozens of thrums at a time.
After knitting a 2 ½ inch cuff, I started to insert thrums every fourth stitch and every fourth row.
Even the thumb is thrummed.(try saying that three times in a row!) Looks really great on the outside, wait till you see what's on the inside!
How crazy is that?
Over time, the thrums will felt to eah other and to the knitted mitt to form a warm felted layer on the inside of the mitten. But to help things along, I intend to wet the mitt and start the felting process by gently rubbing with a bit of soap and hot water, just to make sure that the thrums are lined up properly and don't felt in lumps...I would hate lumps on the inside of any mitts.
I intend to make more of these. Too much fun.