A dual fabric technical long sleeve base layer that delivers on both the two key indicators, insulation and breathability, and provides maximum performance across a range of cooler conditions. Constructed from a merino rich blend, Cosette is extremely comfortable against the skin and has flat locked seams to prevent chafing.

The structured front section captures air within the weave itself to improve thermal insulation while the cutting edge technology means that heat absorbed by the yarn during periods of intense effort can be returned to the body to improve microcirculation. The fibre blend on the the back and arms has been specifically designed to provide outstanding wicking and unrivalled moisture transfer.

Highly adaptable and with a race fit, Cosette can easily be worn under a jersey or jacket, on its own or as part of deep winter layering.