J. Crew Alicia cupro-blend racerback slip dress in Navy Blue We added a sporty racerback to our best-selling ‘90s-inspired slip dress for a take that’s just as sleek, not to mention versatile. Plus, this dress was crafted from cupro, which is just as smooth as—and way more durable than—silk, machine washable and made from recycled cotton linter at a zero-waste facility. Size: 6 Pit to pit: 18 Waist: ~17 Length: 55.75