This is a White Majestic Seattle Mariners Jersey that has been hand signed by Felix Hernandez. Along with the autograph, this item also comes with the inscription which reads "PG 8-15-12". This one is size XL.  This item has the official Major League Baseball serial numbered hologram for authenticity which can be verified on the MLB website. Although MLB does not issue a paper certificate with their items, a certificate can be printed out on their website.