ROBOTECH Technical Files
by Pieter Thomassen, with Peter Walker and Robert Morgenstern


Hostile Environment Suit

RDF Seal
Southern Cross Seal
REF Seal
Hostile Environment Suit
ArmorWeapon Separator

As the repair of the SDF-1 proceeded, the UNDF began to feel the need for a new generation of environment suit. The suit had to be hard, both to protect from micrometeorites in space, as well as weapons fire and shrapnel. It had to have good protection from radiation, so that it could be used in the engineering areas of capital ships as a work suit, and it had have a low thermal profile, so forward observers wearing the armor would be relatively undetectable by IR sensors. In other words, the requirements called for a jack-of-all-trades.

The HES (Hostile Environment Suit) was definitely that; but it was also master of none. It was heavy, clunky, and not particularly mobile. Because of this, it was a long way from meeting the needs of a military environment suit, or a personal armor suit for an infantryman. The HES, on the other hand, was an excellent suit for engineers in both extreme-temperature and high-radiation environments, and it was in this capacity that the HES was primarily used. In fact, it was only retired from this purpose in 2051 with the introduction of the HES2 by the RNF.

The HES is composed of a plastic-ceramic composite for maximal resistance to penetration and thermic explosive damage for minimal weight. The armor provides excellent protection against small grenade and shell fragments, good protection against small arms fire, and poor resistance to heavier infantry weapons, such as the 12.7mm machinegun round, as well as from fragments and near misses from higher caliber weapons. The HES armor consists of a single full-body unit and a separate helmet.

The HES armor has the following features:

Go to RDF Armor/Weapons Index.

Go to the Robotech Reference Guide Home Page.

Robotech (R) is the property of Harmony Gold. This document is in no way intended to infringe upon their rights.

Content by Peter Walker and Pieter Thomassen, with Rob Morgenstern
HTML by Robert Morgenstern (
Copyright © 1999, 1997, 1995 Robert Morgenstern, Pieter Thomassen, Peter Walker