Riot Society Koi Hoodie. The Riot Society Koi Hoodie features a detailed koi fish and floral design rendered in puff ink at the left chest, with coordinating floral graphics extending down the right sleeve. A large koi fish, wave, and floral graphic covers the back for a bold finish. Designed with a drawstring hood and front pouch pocket, this hoodie has a fleece lining for added warmth, along with cuffed long sleeves and a ribbed hem to finish the shape. 50% Cotton 50% Polyester. Machine wash. Imported.