Recon armor

 is a suit of armor designed to be a comfortable under-armor for the T-45d power armor suit developed by the United States of America. The recon armour is a vacuum-sealed asbestos jumpsuit covering the entire body. Attached to it is the interface and mounts for the T-45d power armour. It's purpose is two fold - it allows the user to actually operate the armour and protect soft tissue from moving parts inside the suit and heat. Unlike the under-armor for the T-51b power armor models, this one is also designed to offer limited protection from anti-personnel weapons.

It has some mild stealth properties, to boot.

T-45d under-armor
The basic suit of recon armor.

Appearances
Recon armor has only appeared in Fallout 3 and Fallout: New Vegas.