50% merino wool 36% nylon 10% yak hair 4% spandex. Made in China. Machine wash. Front button closure. Ribbed trim throughout. Soft, brushed knit fabric. IRO-WK58. 21WWP13MISHA. 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.