Enza Costa Rib Tank Midi Dress in Black. - size 0 / XS (also in ) Enza Costa Rib Tank Midi Dress in Black. - size 0 / XS (also in ) 87% viscose 10% silk 3% lycra. Unlined. Rib knit fabric. Unfinished hem. ENZA-WD173. SRS1678IK. 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.