Declare your loyalty to the Astros by sporting the New Era Astros 9Fifty 40th Anniversary. Crafted for loyal Houston Astros fans, this adjustable cap lets you comfortably cheer on the team from the stands or the comfort of your home. The lightweight polyester woven keeps you chic and relaxed all day. Add a fresh finishing touch to your game-day, casual look with the New Era Astros 9Fifty 40th Anniversary. 100% polyester woven.