The woman in the image is wearing a two-piece set, also known as a co-ord set, consisting of a sleeveless top and a matching midi skirt. The skirt and top are made from the same material and color, creating a cohesive and stylish look suitable for business or casual occasions. 

This style is a popular fashion trend that offers versatility, as both pieces can be worn together for a polished outfit or separately to create multiple looks.