The perfect base layer for intense activity that involves a lot of sweating while requiring thermal insulation in the arm area, such as cross-country or Alpine skiing. This version of the Energyon base layer shirt combines anatomical, highly elastic long sleeves with exclusive Flowtunnels technology to maximise ventilation. Tiny holes in the underarm, chest and back areas are combined with three-dimensional grooves to create a flow of air over the skin to insulate while refreshing. This ensures that body temperature and the athlete's comfort remain constant throughout the duration of physical activity