Rosie Assoulin's aptly named 'Thousand-In-One-Ways' sweater can be worn with the sleeves shrugged off your shoulders, knotted neatly around the waist or detached completely, turning it into a simple camisole. Made from a merino wool-blend, it has a chunky ribbed finish and horizontal rainbow stripes. Style yours with everything from neutral tailoring to high-rise jeans.