This is the exact jersey MLB players wear on the field! Each Authentic Collection MLB jersey is 100% polyester, and the authentic twill logos and patches are sewn exactly how the major leaguers wear them. The Authentic Collection tag is sewn on the front, too. They are built to last and will never shrink. We can also add any name and any number to the jersey, exactly how the players wear them on the field, including name plates and front numbers when they apply. All lettering and numbering is 100% tackle twill, licensed by MLB, and is always done PERFECT!