ADVANCED COMFORT. Nike Tech Top consists of a mix of quality fabrics to offer you high comfort when running. Ventilation, sweat-repellent technology and stretch work together to keep you comfortable, dry and free in your movements. Sweat-repellent stretch The stretchy woven fabric front and back moves with your body as you run. Dri-FIT technology keeps you dry, comfortable and focused. Ventilating freedom of movement Perforations at the lower back allow cool air and warm air. Slits in the hem create airflow and allow you to move naturally. Easily accessible storage The envelope-shaped pocket on the left and the hidden zipper pocket on the back keep your gadgets close at hand. Optimum temperature Sleeves and back yoke consist of a knitted wool blend. The fabric dries quickly to keep you cool when it's warm, and warm when it's cool. More information Normal fit for a relaxed feel raglan sleeves Slightly angled hem behind Reflective Swoosh design and shoulder seam 84% polyes