The jersey has evolved. Today's athletes want cool technical lightweight jerseys for mid-summer games. Majestic answered their call with the Authentic On-Field Cool Base Batting Practice jersey. By taking advantage of Cool Base moisture-wicking you can now stay comfortable as the temperatures outside rise. Just like the Big Leaguers. Features a button front sewn on team lettering woven team specific performance locker tag and a Cool Base side seam label. Made of 100% polyester moisture wicking side stretch micro pique body fabric with brushed back. The sleeve and side panels are stretch mesh made of 92% polyester and 8% spandex. Manufactured by Majestic and officially licensed by Major League Baseball.