Airflow is one of those things you don't think about until it's wrong. A compact vape might have a fixed airflow that's too restrictive—like sucking a thick milkshake—or so open that the vapor feels thin and unsatisfying.

Most CBD users prefer a mouth-to-lung draw, which mimics a cigarette. It's a tighter pull that gives a more controlled hit. Some like a restricted direct-lung draw, but that's less common for CBD. If you're buying for someone new to vaping, look for adjustable airflow. That way they can dial it in. If it's fixed, read reviews to see what the draw is like.