White + Warren Essential Cardigan in Brown. - size XS (also in M) White + Warren Essential Cardigan in Brown. - size XS (also in M) 100% cashmere. Hand wash cold. Open front. Knit fabric. WWAR-WK147. 11092. 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.