This is a “Code Zero” style foresail for the 460. It allows for better downwind and reaching performance than the Jib, which it supplements.
The construction is based on the “Code Zero” type of sails. This sail does not have such a depth and balloon shape like the original Gennaker and is slightly smaller in size, but its usage is much better as it is possible to sail not only on the tailwind, but also on the crosswind and even slightly against the wind.