Stay protected with the Piper SmartCore™ Long Sleeve ¼ Zip Sun Shirt. This top is made with SmartCore™ fabric, which has UPF 50 sun protection, outstanding moisture-wicking properties, and helps regulate your temperature without the need for any added chemicals. Additionally, underarm mesh vents and a 1/4 zip give you extra airflow when you need it, and a stand-up collar gives you extra protection against the sun. It also has plenty of stretch so that it moves with you.