VENTILATED FAVORITE FOR CITY RUNNERS. The Nike Dri-FIT Run Division Crewneck Shirt is a soft piece for layered looks with plenty of surprises. A vent at the back, along with mesh under the arm, provides optimal air circulation for long runs. The material mix includes reflective elements and sweat-wicking technology. With an elastic band at the hem, the piece can be easily stowed away for easy transport. Functionality all day long The Run Division collection goes with you through whatever you're up to. The design of each piece is based on running insights gathered by our Advanced Running Concepts team (ARC team). These products are breathable and lightweight, and stow away effortlessly when not in use. They feature materials and reflective elements that create an ensemble you can wear for both everyday wear and training. Breathability and moisture management Nike Dri-FIT technology wicks sweat away from the skin, allowing it to evaporate quickly for dry comfort. Full-length knit material provides a soft feel. Woven material at the shoulders ensures freedom of movement. Under the arms, a mesh insert provides optimal breathability. Simply roll up and pack away With the elastic drawstring at the hem, you can easily stow the top. Simply roll it up and secure the piece with the drawstring for easy transport. Stow away easily Drop-in envelope-style pockets provide secure space for a key or card. Envelope-style drop-in pockets provide secure space for a key or card.