If you just want a single undergarment - which is nice, stylish and provides good function - then Active Comfort is probably the best choice you can make. This soft and comfortable t-shirt keeps you dry and warm during all types of physical activities, and works both as an undershirt at cooler temperatures and as a training shirt on its own in milder weather. The garment has an ergonomic fit for optimal freedom of movement and seamless design for extra comfort. Zone-adapted material structures provide effective temperature control. Available in many different colors.