The T-51 Power Armor is a bulky, humanoid exoskeleton with a retro-futuristic design, featuring angular armor plates and a distinctive rounded helmet with a single visor slit. The armor's surface is heavily textured with visible weld lines, scratches, and weathering, reflecting its post-apocalyptic use. It is primarily painted in a military olive drab with faded insignias, and includes functional details like hydraulic pistons at the joints and a fusion core power source visible on the back.