Shimano Vented Long Sleeve Shirt are constructed of 100% Polyester. Features include: •UPF 30+ •Quick dry & Breathable •Back and under arm mesh vents •Roll up sleeves with button/tab •Under collar buttons •Bellowed chest pocets with flap closure and eyelets •Utility tabs on left pocket flap. Available in Blue, Khaki, and White; Sizes M-2XL.