This all started when I saw a couple of people at Echoview Fiber Mill making thrummed slippers. Not long after, Echoview had a big sale where they were getting rid of some gorgeous colors of roving. I needed no other signs! I bought up what I thought was a lot of roving. Good thing I did, because I used all of it.
By the way, if you're interested in thrumming, Echoview has an awesome thrumming tutorial.
Yarn: Columbia Minerva Knitting Worsted in Turquoise (I inherited this yarn and had it in my stash for maybe even a decade)
Roving: from Echoview Fiber Mill