IRO Clay Tee in Black. - size S (also in M) IRO Clay Tee in Black. - size S (also in M) IRO presents a fresh take on a casual essential with the extraordinarily comfortable Clay Tee. Crafted in soft linen fabric, this perfectly draped crewneck tee cops its urban chic aesthetic from tasteful distressing throughout.. 100% linen. Hand wash cold. Destroyed detail throughout. IRO-WS29. WF19CLAY. Launched in 2002 by French brothers Laurent and Arik Britton, IRO combines vintage-inspired prints with city style. Their collection features an ever-changing color palette and styles that range from wardrobe staples to on trend pieces.