Hell in a Cell
The concept of the show comes from WWE's established Hell in a Cell match, in which competitors fight inside a 20-foot-high roofed cell structure surrounding the ring and ringside area. Each main event match of the card is contested under the Hell in a Cell stipulation, while one or two other Hell in a Cell matches may occur on the undercard. Variants of the Hell in a Cell stipulation have been featured, some of which are "firsts," for example, the 2011 event had the first triple threat match contested inside the Hell in a Cell structure. The 2018 event also saw a redesign of the Hell in a Cell structure, which was entirely painted crimson-red and became smaller, with the wires being less pliable, making the structure stronger, yet lighter.