depends on the mask, I haven't really gone deep enough wearing one to need to really equalize or notice my ears not being able to equalize on their own, but i would do the swallow technique if i needed too. Some FFM's still have rubber that goes over the nose area so you might still be able to pinch your nose and blow if that is typically how you clear your ears. Like I said though, the deepest I've dove with an FFM on was about 10ft LOL... I volunteer at the aquarium, the tanks that we use FFM's on don't get very deep ;-)
