From Command and Conquer Wiki

The Moebius Suit was the first suit designed to withstand the harmful effects of Tiberium. Dr. Moebius invented it so he could experiment with Tiberium unharmed. Dr. Moebius' daughter, Sydney Mobius, made some modifications to her father's design so the suit was not only usable in a safe laboratory environment but also in combat. Therefore the suit's armor was upgraded and targeting systems were implemented.

The development of this suit, along with the Wolverine, would eventually help spawn the creation of Zone Trooper armour, when Tiberium saturation reached critical levels in several areas.