Question:
May I buy yarn from an upscale yarn store that’s a mix of cashmere and linen?
Answer:
Hello,
You may, however the yarn should be checked for shatnez. Although cashmere is not the wool prohibited to mix with linen, nevertheless, often there is indeed wool mixed into the cashmere, which would make it shatnez. Therefore the yarn should be checked to insure that it indeed that there is no wool in the yarn. Please see the following link https://dinonline.org/2017/01/22/cashmere-and-shatnez/
Best wishes