Due to the free-to-play nature of Super MNC, the game is constantly updated with new cosmetic items that can be purchased by players with real money, be acquired in trades or by a random post-game prize drop.
Gear is the most obvious customization aspect by having direct influence on the appearance of a pro. Gear is separated in head, torso and leg parts that can be mixed as you wish. If the resulting combination differs from a full uniform set, you need to create a new custom Gear Set to have access to it in game.
Flair, as opposed to uniforms, is shared among all pros. Flairs are optional accessories such as pins, sun glasses, moustaches and other items that can be attached to predefined spots on the pro. Although being usable with any uniform, Flair needs to be part of a custom Gear Set to be used in game.
Weapons, with the exception of Blitz Weapons, don't offer any advantage over the default weapons of a pro and are purely cosmetic. Weapons can be assigned directly in the pro selection screen or as part of a Custom Class.
Taunts are animations that can be played on demand by pros at any time. Taunting after a kill grants extra money and is shown as close-up to the killed player. The original six MNC pros all come with individual taunts, as opposed to all new pros who have two rather unspectacular default taunts shared among them. New taunts can be purchased or be acquired with a small chance per random drop. Taunts can be assigned directly in the pro selection screen or as part of a Custom Class.
Products are game-changers. They activate automatically when certain events occur and grant their specific bonus to the player in that case. Three products are saved as a Product Set which can then be assigned directly in the pro selection screen or as part of a Custom Class.
Endorsements give direct, very minor stat boost to the pros. They usually come with a negative side effect, so owning a lot of high tier endorsements does not make a player much better than one without endorsements. Up to 25 endorsements make up an Endorsement Set which can then be assigned directly in the pro selection screen or as part of a Custom Class.