Super Armor (スーパーアーマー) is a property that certain attacks in the Street Fighter series have.
Introduced in the Street Fighter III series, Super Armor, grants the ability to absorb a single attack without being hurt or even being stunned. Such an ability is bestowed by certain EX Special attacks and, in the Street Fighter IV series, by Focus Attacks (where the manual refers to it as Hyper Armor). When struck while employing Super Armor, the armor disappears, but damage is not done.
In the case of a Focus Attack, a portion of the user's Health Meter is greyed out as provisional damage, instead of losing it outright. The health meter recovers gradually to what it was, with health slowly filling the grey segment if the player is not hit again; however, if, hit, the amount of health represented by the grey segment which has not yet recovered is permanently lost, as well as whatever other damage the second attack inflicts.
One of its most advantageous qualities is that the being hit once does not interrupt whatever attack the armored character is performing; he or she simply ignores the first strike. The armor is not without its flaws, however. In addition to having the armor broken by a series of repeated jabs or the like, the user must also beware throws (which do not strike, and thus bypass the armor) and certain special attacks which possess the Armor Break property, explained below.
In the Street Fighter IV series, most characters have at least one Armor Break attack (such as M. Bison's Psycho Crusher or Guile's Flash Kick) with which to counter Super Armor. Moves with this property completely ignore Super Armor to deal damage. When a character with Super Armor is struck by an Armor-Breaking attack, there is a sound and a visual effect of glass shattering. The attack itself proceeds as normal.