Rib knit dress Ribbed Sleeveless Knit Long Dress Long knitted dress, Tank dresses Black Ribbed Knit Sleeveless Dress Sleeveless rib knit sweater 10063630_798 Tiffosi Ribbed Knit Sleeveless Dress In Metallic Black Styledup.co.uk. Our slim fitting midi dress is crafted from 100% Mongolian cashmere and defined by a ribbed mock neck with delicate pointelle detailing. Sleeveless with cable knit edges, it falls to a softly flared hem that creates a fluid, feminine silhouette.