White + Warren Crew Neck Sweater in White. - size XS (also in ) White + Warren Crew Neck Sweater in White. - size XS (also in ) 60% cotton 40% poly. Hand wash cold. Ribbed trim. Buttoned arm openings. WWAR-WK110. 17004. A well-known name among luxe lovers and cashmere cravers, White + Warren is the NYC based label that has been defining cold weather wear for the last 17 years. White + Warren eloquently manipulates knitwear taking it from functional to fashionable. Everything from tees to joggers, wraps to ponchos make up their arsenal.