From the officially licensed co-brand with Toei Animation, this is Dim Mak x One Piece.  

The Dim Mak x One Piece - Straw Hats Baseball Jacket - Black features a luxurious satin bomber style with embroidered patches on the sleeves and a tackle twill applique embroidery on the back. Made with 100% Nylon, this jacket may run a bit small so we suggest purchasing one size up for a more relaxed fit.