Are surgical masks sealed around the edges? I've only worn N95 before and if you don't have a proper seal you're not even filtering the air. That's what I've al

Are surgical masks sealed around the edges? I've only worn N95 before and if you don't have a proper seal you're not even filtering the air. That's what I've always assumed was the problem with surgical masks. It's not that they're not a good enough filter, it's that they aren't even filtering the air when you breath in. But I might be wrong.