I would recommend sweaters with the following fabrics:
Bamboo
Are you suffering from eczema what sweater can be comfortable for your skin? I always recommend bamboo material because it is soft and has better absorption. It also contains antibacterial features and great at regulating temperature- it gives the required warmth in winter and coolness in summer.
Cotton
Cotton is cool and absorbent. It is soft and breathable, thus allowing the skin to breathe. Most cotton outfits are made with some polyester. But if you carefully read the label you will be able to be keep on the amount of cotton used in the textile before using it.
Silk
I also recommend silk because it is soft, good at temperature regulation, and highly breathable. Unfortunately, washing them is a bit tricky and may retain creams.