French model Constance Jablonski and Romanian model Andreea Diaconu, after A Show, Paris, September 2015.
Suede pants + chambray shirt + pristine white sneakers (how is that possible!) + a classic Saint Laurent tassel bag = casual perfection. 
Recreate Constance's look (kind of):
Chambray shirt — Madewell cotton-chambray shirt, Current/Elliott The Perfect shirt, Hilfiger Denim Chambray shirt, Rails Carter Chambray shirt, Equipment Margaux chambray shirt, Joie Cartel Chambray shirt, J.Crew Always Chambray shirt, R13 Chambray Oversized shirt or Topshop Light Chambray shirt
Suede pants — Frame Le Flare suede pants, Paige Denim Bell Canyon High Rise suede flare pants, Alice + Olivia suede bell bottom pants, or Getting Back to Square One Suede flare pants
Saint Laurent Monogramme leather shoulder bag