A third kit is usually worn during Champions League games. Not all clubs have one, and marketing, creating and launching one must be justified by significant replica sales.
It used to be a “trend” a couple of years ago, now kit manufacturers pay close attention to whether or not a 3rd kit generates revenue or not.
Gold/Black/Red is the chosen colour palette. The 3-stripes are black so are the inserts on the sides. A traditional red/black crew neck with the italian flag on the chest. The fabric, with climacool technology, has been enriched to guarantee superior comfort.
AC Milan will wear the 3rd kit on May 12 in San Siro against AS Roma.