The Ninja Way is to be inconspicuous. I can't just walk around in my black pajamas all day. Because then people will KNOW that I'm a ninja for sure.
Although, I have considered putting some Kevlar armor in my slacks, because sometimes you just need a little extra protection when throwing high kicks around.
I have armored pants that go UNDER your usual pants. CE approved and you cant even see them. When I get to work, I go into the bathroom and take them off. Slacks provide no protection at all, and I've seen way too many people loose skin that they had grown accustomed too.
Is is literally hot. I wore this in 100 degree weather and it was NO FUN. Better than leathers I guess though. And when they're covered in sweat, good luck taking them off.
I live in Phoenix, where it triple digits all the time.
I wear Under Armour's "heat gear", which is basically like Bro-Spandex. It wicks the sweat away, but you smell like a butthole for the rest of the day.
And it's near impossible to get off my fat self when it's wet.