Label calls it “Gleneaton formerly Lady Fair”. Feels very much like a kroy-type wool or a sock wool blend. No other information on the label so it must precede labelling regulations in Canada.

If it is the same as Lady Fair then it is 100% acrylic:
https://www.ravelry.com/yarns/library/eatons-yarn-lady-fa...

Do not confuse with “Eaton 3 Ply Fingering”, a wool/nylon/rayon blend:
https://www.ravelry.com/yarns/library/eatons-yarn-3-ply-f...