IRO . JEANS Cenix Knit in Black. - size XS (also in ) IRO . JEANS Cenix Knit in Black. - size XS (also in ) 54% cotton 36% poly 10% rayon. Hand wash cold. Intentionally distressed and destroyed throughout. Raw cut hem. IROJ-WK14. 17WWP12CENIX. Clothing was not enough for the french brothers Laurent and Arik Britton, but they had to conquer denim as well. Introducing, IRO.JEANS, for all your basic denim needs.