The Icebreaker Kinetica Long-Sleeve Crewe Shirt is designed to move with you through a wide range of activities. With no shoulder seams, bonded side and back seams, and a low-profile merrow stitch, the Kinetica is designed to avoid chafing whether you're biking, running, or climbing. Its Cool-Light fabric wicks moisture for dry comfort in hot weather or during strenuous activity while the eyelet mesh back enhances airflow. Merino fibers naturally repel unwanted odors to keep you fresh in the gym or on your backpacking trips. These merino fibers are wrapped around Tencel fibers to enhance durability and to provide you with a soft next-to-skin feel.