Enza Costa Rib Tank Dress in Blue. - size 0 / XS (also in 1 / S,2 / M,3 / L) Enza Costa Rib Tank Dress in Blue. - size 0 / XS (also in 1 / S,2 / M,3 / L) 87% viscose 10% silk 3% lycra. Unlined. Rib knit fabric. Unfinished hem. Intentional color variation throughout. ENZA-WD187. SRS1678BR. 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.