Rag & Bone Rue Colorblock Black Boucle Knit Crewneck Sweater in Women's Size Medium. Rag & Bone 'Rue' Merino Wool Boucle Sweater. A marled-bouclé sweater takes an unexpected turn with a contrasting, plain-knit solid back that creates a modern color-blocked effect. Relaxed, loose fit. sweater in speckled knit with solid-color back and cuffs. Crew neckline. Long sleeves. Relaxed fit. Pullover style. Extrafine merino wool/nylon/spandex.