I am plastic, c-through

the gnats in my bedroom know as much
they fly into me as though by accident

an impossibly clean sliding-glass door
that upon approach is nevertheless shut

these small things hit my skin
but leave no physical marks

no gnat guts splattered
on my pocked arms

I am not glass but plastic
I can bend without breaking

Simple guide for you:
Most popular on HP,
Basically, they blow!