Enza Costa Silk Rib Detached Mockneck Sleeveless Midi Dress in Black. - size M (also in XS) Enza Costa Silk Rib Detached Mockneck Sleeveless Midi Dress in Black. - size M (also in XS) 87% viscose 10% silk 3% lycra. Unlined. Pull-on styling. Mockneck with front cut-out. Slinky ribbed fabric. Made in USA. ENZA-WD302. SRS5274. 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.