we’re are the Schematics 4 these add-ons
And also no gas resistance…
There are only 7 types so far, maybe the other 3 have yet to come.
If you wear a gas mask, you get gas resistance.
What could be meant with Impact resistance?
There is a schematic for padded shoes which gives you fall resistance (for padding impact damage if you fall) , but that’s listed, too. 
Either you’re right, Gysbert, or it’s an accidentle (inactive?) doubled entry with different names.
The impact is for the melee attacks like the runners or the tanks even the tick. It’s so you don’t take a lot of damage and fall over as easily
the is no impact schematics or impact upgrade, there is just some cloths when picked up might have 1% already installed on there, just a warning 
if you overwrite the 1% with another clothing upgrade, u will lost the 1% forever on that clothing item
1% is almost nothing.
Isn’t there a skill that increases this impact resistance?
Does anyone have it and can show its values on that screen?