MLB and Nike sent out a press release today with additional details on their new “vapor premier jerseys” which will be the official on-field jersey for all 30 teams in 2024.
The release stated:
Developed over multiple years, the Nike Vapor Premier jersey was engineered to improve mobility, moisture management and fit, while keeping sustainability in mind — bringing inspiration and innovation to athletes. Its breathable, lightweight, high-performance fabric was made from at least 90% recycled polyester yarns. It also provides 25% more stretch and allows the jersey to dry 28% faster, with moisture-wicking Dri-Fit ADV technology to help ensure athletes stay cool all game long.