Cosmic Suits are specialized armor worn by members of Frieza's race in order to increase their power and combat capabilities.
Cosmic Suits are made by combining the natural Bio Suits of Frieza's race with technology. They increase the power of their user. It can also be used as a way to repair the physical damage to a Frieza's race's member's body after being heavily injured, as members of their race are capable of surviving horrific injuries that would be fatal to most other races. Unlike cybernetic parts and other machines made by humans, however, the Cosmic Suit's mechanical parts are unable to prevent the user from having their ki being sensed.
Video game appearances
In Dragon Ball Online, Cosmic Suits similar to the one utilized by Mecha Frieza are available for Time Patrol members to wear. The Cosmic Suit appears as an outfit for Frieza's race custom characters in Dragon Ball: Xenoverse.