Performance Tech is a lightweight base layer in a wool and lyocell blend meant for training in all temperatures. Strategically located mesh panels under the arms provide optimal ventilation. Flat seams and premium thread quality for optimal comfort. A perfect blend of Tencel®, merino wool and technical fiber ensures optimal insulation, fast drying and moisture wicking. Like wool, lyocell adapts to varying body temperature and provides a fantastically soft surface. Product suitable for all intensity levels, summer and winter.