One Piece T-Shirt This One Piece t-shirt is perfect for fans of the anime and manga series. The shirt features a high-quality print of the Straw Hat Pirates' Jolly Roger on the back, and is made from a soft and comfortable cotton blend. It's available in a variety of sizes, so you can find the perfect fit. Whether you're wearing it to a convention, a casual day out, or just around the house, this One Piece t-shirt is sure to turn heads.