I really want to make Calorimetry. I need to find a good non wool substitute. I’d like to find something that would be somewhat warm since it is to cover my ears and to not pill. I think something that looks like Noro would be nice. I’m not well versed in what is out there. I tend to get yarn at the craft store since I’ve mostly worked with cotton. I don’t want to spend too much either. Once Halloween is over I will need to look into this more.