The super-lightweight Heat Gear fabric provides excellent coverage without weighing you down. Mesh panels in the armpits and back for strategic ventilation. The material wicks away sweat and dries very quickly. The ergonomic design protects the seams and increases durability. Hybrid raglan sleeve construction for greater range of motion and comfort. You can put your initials or number on the label on the back of the neck for easy recognition. Odor control technology minimizes odors.