100% Polyester Mesh Fabric, Machine Washable Tech Stretch Mesh Fabric Wicks Moisture Away From Skin, Dries Quickly and Is Ultra-Soft to The Touch, Excellent Breathability and Ventilation. Perfect Active Shirt for Running, Gym, Physical Fitness, Weight-Training, Workout, Bodybuilding. The Raglan Sleeves Allows Your Arms to Move More Easily. Lightweight Tech 4-Way Stretch Mesh Fabric Allows Greater Mobility in Any Direction, Lightweight and Soft. Raglan sleeves allow for full range of motion: UPF 50+ Safeguards Your Skin from Harmful UV Rays. Flat Lock Seams And Tag-Free Printed Crew Neck, Prevents Chafing For Absolute Comfort.