How do call these kinds of menu style and Can I get it free?

when i click mobile menu icon ,Main menu is expand like this ( you can check in Screenshot).
This is not drop down and I don’t know how to call it. If someone know pleae tell me how to call it. Can I get these kinds of menu in free themes of a thems?
Thanks and Best Regards
Zin Mie

Hello,

If someone know pleae tell me how to call it. Can I get these kinds of menu in free themes of a thems?

It’s a sliding menu, we have it as mobile menu in GreatMag, Talon, and Leto theme. Please feel free to ask any other questions that you might have.

Kind Regards, Roman.
aThemes Support