Malene Birger Bibbian Belt Bag! Totally perfect for the ladies who ride...
Not only am I in love with that bag, but this photo/styling is so fantastic!
From the hat, to the makeup, pulled back hair, cuffs, outfit, her stance, THE CHAIR & linen backdrop. I can't stop looking at this photo... :)

Totally getting one of these book straps! Found via Design Milk