French model Othilia Simon, after Balmain, Paris, September 2013.
That tan bag? The single, delicate chain earring? Hippy-chic tie-dye? Just gorgeous. 
Recreate Othilia's look (kind of):
Tie-dye top: Proenza Schouler tie-dye top, or Proenza Schouler tie-dye long-sleeve tee
Tapered jogging pants: Rag &Bone Easy jersey-crepe tapered pants,  Emerson Thorpe Emila pants, or Topshop crepe joggers
Tan bag: Saint Laurent Medium Betty Bag, Tory Burch Marion Messenger bag, or Delvaux Madame PM (saw lots of girls carrying these — particularly in pretty pale turquoise — during PFW). ASOS Rose through earrings, or Maria Black Monocle gold-plated earring