It should say somewhere on the screen what the button is. In the Inventory menu you can toggle your helmet on and off. In Mass Effect 2, Commander Shepard's armor can be customized by swapping out pieces of the default N7 Armor for pieces purchased from merchants, or made available as downloadable content, by using the Armor Locker aboard the Normandy SR-2.Besides augmenting the armor's physical appearance, these pieces also have varying effects on Shepard's combat effectiveness. 15 Hide Helmet Tweak Despite previously including a helmet toggle option in the first Mass Effect title, Bioware for some reason removed this feature from Mass Effect 2. Mass Effect 2 is no exception and has a variety of mods available to liven it up a little, check out these top recommended mods. Level 2 Original Poster 2 points 2 years ago. Also, to switch between helmet on and off quickly what I did was that after I tested it I just switched (by renaming it) between the helmet on file and the helmet off file.