The New Era 39Thirty M-Crown delivers authentic MLB styling with a structured fit designed for serious fans. Featuring the Seattle Mariners branding on a classic grey base, this cap combines New Era's signature curved bill with their precision-engineered M-Crown construction for optimal comfort and shape retention. The 39Thirty sizing system ensures a secure fit across various head sizes, while the breathable fabric construction keeps you comfortable during extended wear. Perfect for game day or everyday casual wear, this officially licensed cap represents one of baseball's most iconic franchises.