What's this "hair" you speak of?

Seriously, I keep mine (what's left) about 1 mm long, or even less in the summer. I use a standard electric barber clippers, set on their closest setting, about once a week.

And even though I shave the top of my head, I find that shaving the sides is too much work. To support the "cue ball" look requires a full-on shave job every couple of days to avoid stubble. And I'd much rather spend the time on keeping my tanned and buffed legs shaved smooth.