"Fitted but flexible," Kanan replied. "I wear my long coat around, sure, but if I'm going to be doing less gunslinging and more..."

He waved a hand around vaguely, which was apparently supposed to indicate that he'd be using his lightsaber more.

"... I'm going to want something that won't catch while I'm moving around."

Which he would be doing a lot of. And besides, he really wanted to steer clear of anything that might even remotely be mistaken for robes.