This base layer is developed to save your energy for the toughest workouts. The Ultralight Cool base layer helps keep your core temperature down, to allow your body to have more energy during your activity. The cooling effect of the recycled polyamide is engineered for moisture wicking and quick drying to keep you cool, dry and comfortable. With a knitted anatomical shape and seamless technology, it fits perfectly to your body, ensuring optimal support for your sports performance.