An epic Arizona Diamondbacks throwback is slithering your way with this 2025 City Connect Batting Practice 39THIRTY Flex Hat from New Era. The 39THIRTY is New Era's premier stretch-fit style, engineered specifically to create a comfortable fit and breathable construction for all-day wear. The vibrant color scheme, inspired by the team's 1998 jersey, adds a fun retro feel to this piece, making it the perfect accessory for game day.