Wool is a particularly apt material for sweating because it is breathable, quick-drying, and moisture-wicking. These properties can help your body temperature regulate while staying comfortable. Wool is traditionally used as an insulator, but the wool options on this list are great all year-round. The fibers react with your body temperature to retain heat in winter and breathe easily in the summer. Wool can absorb the moisture produced by your body and allow it to evaporate quickly, before you feel sweaty and clammy.