Are Hijab and Niqab part of Islam?

I think lot of Muslims struggles these days with question whether hijab is traditional or not. In fact lot of Muslims around the World are convinced that Niqab and Beard are not part of Islam! Astagfiruallah.

I read mashaAllah a very informative article on whether Hijab is really integral part of Islam or not. Here is the link to that article http://www.salahtimes.com/announcements/view/are-niqab-and-other-forms-of-hijab-simply-traditions-and-cultural-practices

Here are a few important lectures that explain in detail why Niqab is an integral of Islam.

JazkaAllah khair for reading my post and hope it benefits you all inshaAllah :)