As of this update EVA boosts stats have been modified. while they are now more effective at countering the temperatures in space there is a bug that allows them to give a medium / light armor a negative armor value. Negative armor values should be rounded to 0 because one a negative armor value may function function as a damage multiplier. While one can have armor that doesn't provide physical protection 0 armor. One cannot have armor that causes the player to suffer amplified damage.