The polybag has light grey and grey parts, and looks somewhat like an Imperial Star Destroyer but has openings on the side. It has a wedge shaped structure, and has two spherical power generators on the sides of the bridge.
The Resurgent-class Star Destroyer was an iconic model of Star Destroyer built by Kuat-Entralla Engineering and utilized by the First Order during its conquest of the Unknown Regions sometime after the signing of the Galactic Concordance. Based off the Imperial-class Star Destroyers of the Old Empire, it featured advanced weaponry and represented the might of the Order's military throughout the galaxy. It was still considered a new model shortly before the Battle of Starkiller Base.
Despite its impressive size, it was not the largest vessel within the First Order's Navy, with Resistance intelligence believing even larger warships were in development.