Men's functional Tshirt 4F with short sleeves and a round neckline is made of highquality and quickdrying material that has a snug fit. The sleeves will give you full freedom of movement during exercise, and ventilation in the armpits will improve airflow. Flat seams are very comfortable and do not irritate the skin. This Tshirt is ideal for all sports and outdoor activities. It guarantees convenience and convenience in every situation.quickdrying material in 4FDry technology promotes moisture wickingventilation in the armpits improves airflowraglan sleeves ensure a full range of motionflat seams prevent skin irritationClosefitting fit