The pale reference shows a closer long floral shape beneath a higher decorated neck frame. A larger open-looking V-shaped area sits at the front inside that frame. A fine central line and possible fine ground limit what can be said about entirely bare skin. Fine-looking longer areas follow the arms, with additional cape-like outer surfaces continuing down at the sides. Both hands remain low beside the body.
Compare the larger front centre with its high outer boundary first. This is different from asking about the number of inner layers or how the side areas attach. The photograph establishes neither detachable parts nor a particular composition. Without further product information, the open impression should not be described as a completely uncovered chest.
Request a close front view and an explanation of the fine ground on a similar actual model. Then see where the side areas lie with the arms held normally. If two configurations are offered, ask for the change to be demonstrated on the real dress. One decorative view cannot replace that practical information.