The Men's Nike Heather Green Oakland Athletics Authentic Collection Early Work Tri-Blend Performance T-shirt is the perfect way to show your support for the Oakland Athletics. Made from a comfortable polyester, cotton, and rayon blend, this t-shirt features screen-printed graphics that proudly display your Oakland Athletics pride. The crew neck and Dri-FIT technology keep you comfortable all day long, whether you're cheering on the A's at the stadium or relaxing at home.