For years, cotton was considered the best fabric to wear while exercising. However, with recent advances in fabric technology, cotton is no longer the recommended option. Compared to most technical fabrics, cotton retains perspiration, which leads to chaffing and blistering. Fabrics like Coolmax, DryFit, or ClimaLite pull moisture from your skin and allow it to evaporate. These fabrics better regulate your body temperature to keep you cool in the summer and warm in the winter and they minimize chronic chafing or blistering. Plus, they’re now available in everything from running tops to hats and socks.