Answer According to information listed under the product Specs tab: Fabric: 38% nylon, 30% merino wool, 31% polypropylene, 1% Lycra
Answer The fabric is a blend of merino wool, nylon and polypropylene, according to the description on the webpage. You had best check with your allergists as to whether you also have an allergy to polypropylene. Sorry I can't be of more help; Chemistry class was a long time ago for me!
Answer I am sorry I don't remember since they were a gift.
The label says: "Fabric is a blend of merino wool, nylon and polypropylene".