That's a lovely picture! The woman is wearing a beautiful, long-sleeved tunic (often called a Kameez or Kurta in South Asia) in a deep maroon or burgundy color. The fabric looks like a slightly heavier, suitable-for-winter cotton or blend.
Here is a detailed description, tailored for a winter 2-piece suit featuring a Farshi Shalwar (though only the kurta is visible):
SIZE
SMALL, MEDIUM,LARGE ,XL
STUFF
STONE LINEN