Two-layer Racer Back Dress von Y-3. Black Sheer Sleeveless Jersey Two-layer Dress With White Stripe Embroidery. Y-3 Dress Has A Racer Back, Sheer Panel At One Side, A Scoop Neck, A Shorter Underlay, A Designer Stamp On The Back And Simply Slips On. 66% Polyester, 34% Nylon; Lining: 92% Modal, 8% Elastane. Dry Clean.