Base layers are worn next to the skin and should be close fitting but not restrictive They are made with advanced synthetic materials that have a “wicking” ability This means that they wick moisture and perspiration away from your body and to the outermost layer of the fabric, where it can evaporate easily, keeping you dry and comfortable
Base layers are suitable for types of sporting activity and are much better than cotton t-shirts which simply hold moisture next to your skin making you cold and uncomfortable