I made them for one of the elderly neighbours here in Waimate and I purchased the yarn from the yarn/craft shop here in town. It's a "baby" wool although there is a couple of dark colors too.
The yarn is 100% pure merino wool made in New Zealand. The brand is I Love Knitting based in Wanaka. I couldn't find any further info on the web!!! So clearly not everything is available on the Internet.