What is this item of clothing and where can I get it?

I was at a thai restaurant and the girl serving us was wearing these awesome silky capris that were loose and flowy and light like a skirt but were banded at the calves where they ended.

I am not sure it is Thai clothing but it is definitely foreign. I tried searching by description but couldn’t find anything that seemed to match.

They are awesome looking and it is unbearably hot this summer. Does any one have any clues?