Woah woah it's a lot of scientific stuff that I'm actually not sure Dr. Pym wants to be shared, but, the short of it is that the Pym Particle allows me to increase and decrease the size and mass of myself. And other objects. The suit and helmet protect me and my molecules from imploding. The contents and actual schematics of all that I can't disclose. Because it's not mine.
Well I promise not to gossip. It's none of my business!