NA, you should check with your sister to find out what EXACTLY she used to crochet that afghan. There are soooo many different kinds of wool fibers it absolutely boggles the mind. It has to do with the staple length and the micron (thickness) of the wool. Wool from merino sheep has an average micron of 18 - 22, while wool from a BFL has 24 - 28. Shetland, which is amazing wool, can have a tremendous range depending on the breed, anywhere from the 20's all the way up to the 50's. Obviously, the higher the micron count, the courser the wool will feel. A lot of merino is used for socks and next to skin wear. Shetland is typically used for sweaters, coats, blankets and rugs. I love a good merino, alpaca blend. And if it has some silk or cashmere thrown in, oh my gosh! That is total freaking heaven! Don't give up on wool or lanolin. I'd love to make you a pair of mittens to try out. I.ve got some other projects on needles, but I'd love for you to try a good pair of merino mittens.