Last decade's dynasty popped up again out of nowhere in the city by the bay, and this is their officially licensed authentic on-field pre-game/batting practice top as worn by the actual players themselves during the Majestic apparel era in MLB, made of 100% lightweight polyester with triple-layer tackle-twill embroidered SF logo on the left chest. This is super-light Cool Base garment with a 3-inch zipper on the front collar and 3/4 sleeves that cover below the elbow.