Seamless base layers are great in concept. Designed for stretch, comfort, and fit. However, too often the nylon/lycra fabric feels great when you put it on, but ends up feeling wet while riding, and freezing when you come to a stop. Castelli aimed to change all that with the Core Seamless Base Layer LS. By using polyester and polypropylene yarns, Castelli was able to creat a fabric that offered a good amount of warmth and wicking, while still maintaing the stretch fit and comfort of a seamless baselayer.

Surprisingly warm for it's weight the Core Seamless Base Layer LS is ideal for cool conditions and provides excellent moisture management.