J. P. Ourse & Cie. Butter/Kiwi The Madison Avenue really shows off J.P. Ourse's luxurious Yellowstone leather. It's designed to lay flat on your body, so it rides comfortably with minimal bounce. Classic styling dresses up or down.Material: Yellowstone full grain aniline dyed leather Yellowstone Collection,J.P. Ourse,Short Shoulder Straps,Handbags Collections,Leather Handbags,Leather,Shoulder Bags