Enza Costa Cashmere Silk Rib Long Sleeve Crew Top in Blue. - size S (also in ) Enza Costa Cashmere Silk Rib Long Sleeve Crew Top in Blue. - size S (also in ) 90% rayon 10% silk. Rib knit fabric. ENZA-WS656. SR242. Designer of Enza Costa, Rogue, is a Canadian born based in Los Angeles. The line consists of comfortable yet luxurious fabrics like silk, cashmere, and supima and definitely brings to the collection a sort of understated sheer elegance. A staple must-have in any wardrobe, her tees are featured on celebs like Kristen Bell and Jennifer Lopez.