Underarmor

Underarmor refers to a type of garment designed for wearing together with power armor of various types, meant to increase the comfort of the operator when wearing the outfit for extended amounts of time.

Undersuit


 Designed from the ground up for use in conjunction with the West-Tek power armor frame, the next generation underarmor is a form-fitting suit designed for maximum comfort and utility while operating the armor. Although it (or the hood) is not a requirement for operating the armor, it makes long-term use more comfortable and reduces chafing. The hard points and attachments on the suit also improve performance, interfacing directly with the armor's systems. The suit wasn't designed for use outside of armor: It features only two pockets on the hips for documentation and maps and a simple flap over the crotch. Its comfort and lack of bulk allow the operator to combine it with a variety of tactical gear and protection, for example, combat armor. 

Behind the scenes

 * Both the recon armor and the uniforms are internally coded and referred to as underarmor. Whether this is a retcon or evolution of the design is not certain.
 * The underarmor would serve as the basis for the armors of Kells, Arthur Maxson, and likely Cade. The assets still remain in the files and can be seen below: