Goggles strap: Outside your swimcap, or inside?

Inside the cap the goggles, when properly set, are less likely to slip off during the the start. Sometimes during events I wear goggles over cap with a second cap over goggles.

Inside the cap the goggles, when properly set, are less likely to slip off during the the start. Sometimes during events I wear goggles over cap with a second cap over goggles.