September Birchbox Sample Choice Selection is available for Birchbox Aces today, August 28th and for everyone else tomorrow, August 29th.
You can email Birchbox customer service to request one of the three following samples be included in your September Birchbox:
Briogeo Rosarco Milk Reparative Leave-In Conditioning Spray
Daily Concepts Your Facial Micro Scrubber
M·A·C Cosmetics In Extreme Dimension 3D Black Lash Mascara