composite shell for protection, the advanced model uses lightweight metal alloys as a basis, reinforced with Its angled surfaces also help maximize the chance of outright deflecting projectiles and incoming fire. The unusual, insect-like design features a pair of polarized eyepieces in place of the usual vision slit, providing superior battlefield awareness.

Perhaps the most noticeable change was a completely new helmet assembly. Classic power armor pauldrons were retired in favor of a hump that encloses the operator's head, significantly reducing the chance of enemy fire damaging the vital areas surrounding the head. The resulting space savings allowed for reducing the armor's profile without compromising protection. While the T-51 power armor relied on a lightweight poly-laminateceramic castings at key points. The X-01 advanced powered infantry combat armor is designed for a single human operator, provided with the comfort and protection of a next-generation suit of armor. Work on the model was restarted by the Enclave in 2198, although it wasn't until 2215 that the research efforts began in earnest under a presidential mandate, with the first production model created in 2220. It represented a radical, new approach to designing powered armor, eschewing traditional armor design philosophies, but was never deployed in larger quantities until the 23rd century. The first test batch of the armor, designated X-01 Mk I, was developed for presidential bodyguards, and served as the baseline for the remnants of the United States military, who developed it into a power armor tailored for the post-War wasteland.

The development of the first suit of advanced power armor, designated X-01, began shortly before the Great War. HTML X01 Advanced Powered Combat Armor MkII | Enclave Power Armor | Fallout 2 & New Vegas by Courier7_BR.X01 Advanced Powered Combat Armor MkII | Enclave Power Armor | Fallout 2 & New Vegas by Courier7_BR

Fallout 2 joining the enclave