Colorful geometric ROCK IN JAPAN FEST. 2017 T-shirt with the number 17 on the back. - Design: Colorful geometric pattern - Event: ROCK IN JAPAN FEST. 2017 - Back Number: 17 - Neck: Black ribbed - Material: Polyester Thank you for viewing. Purchased at Rock in Japan in 2017, worn on that day, and then worn several times as loungewear. It has been in storage for the past few years. There is some fraying at the collar and some pilling. Home cleaned only. Please only purchase if you understand that this is a used item.