Each year on April 15th, Major League Baseball celebrates Jackie Robinson Day, a tribute to the man who broke the color barrier and paved the way for generations of players. Honor a baseball icon and your Chicago White Sox with this 2026 Jackie Robinson Day 39THIRTY M-Crown Flex Hat from New Era. Engineered for a snug, premier fit, this piece provides all-day comfort. With raised, embroidered graphics, this flex fit is a superb way to express your Chicago White Sox devotion. Its M-Crown design sits higher than the original 39THIRTY fit, while the sublimated "42" on the underbill tributes a baseball legend. "42" sublimated on underbill; Brand: New Era; Curved bill; Imported; M-Crown has a semi-full shape that sits higher than the original 39THIRTY; Material: 95% Polyester/5% Spandex; Mid Crown; Officially licensed; Raised embroidered graphics; Six panel construction with eyelets; Stretch fit; Structured fit; The 39THIRTY is New Era's premier stretch-fit style, engineered specifically to create a comfortable fit; Wipe clean with a damp cloth. CN-China Imported Product Specifications 6.00 x 9.10 x 0.50 Material & Care Polyester/Spandex Clean with a damp cloth or soft brush.