5.3 oz/yd²., 89/11 polyester/spandex; UPF 40+ protection; Four-way stretch fabric for increased mobility; Rich, cotton-like feel; Back dart for a better fit; Stylized two-button placket; Threaded grommets to improve ventilation; Side vents for added mobility and ventilation; Buttons with side 'Spyder' etching; Iconic rubberized Spyder bug logo at left sleeve; Rubberized Spyder wordmark at center back;