Scott Lang shrinks down to the quantum level, yet we see his clearly defined body floating around amidst a bunch of semi-formless quantum stuff.
Why doesn't Ant-Man himself dissolve into formlessness?
Hank Pym seems to indicate that there is some explanation when he tells Lang that.
Everything and everyone you ever loved will dissolve into oblivion in the quantum realm. ... Implying that the wearer of the suit will retain his form while everything else looses form.
So what is it that enables him to retain his form at the quantum level?