The trick is in the sides, the part of the breast and arms is a flap expansion which in any Thick or Thin woman will look fine, in the Thick woman will be rounded flap, while in the Thin woman will be a folded flap. On the waist area we have a fabric spring to attach to the area, but keeping the idea of make breathable and loosen clothes for the season.  It is the measured of all the extended fabric without molded. Once is molded each body will fit with the elastic fabric spring, This special gown loosen and free of sizes.