\defaultfontfeatures{Ligatures=TeX}

\setmainfont{Lato}[Extension = .ttf,
UprightFont = *-Regular,
BoldFont = *-Bold,
ItalicFont = *-Italic,
BoldItalicFont = *-BoldItalic]

\setsansfont{Lato}[Extension = .ttf,
UprightFont = *-Regular,
BoldFont = *-Bold,
ItalicFont = *-Italic,
BoldItalicFont = *-BoldItalic]

\setmathfont{LeteSansMath.otf}