Croissant Saddle Bag

From Velo Orange:
 
"The Velo Orange Croissant saddle bag is made of heavy dry waxed canvas. It has a stiffener in back to maintain its shape and a separate pocket for your wallet. There are inner flaps that can be secured to keep the contents restrained on rough roads. The trim and straps are leather.
It's about the perfect size for a long day's ride with room for a tool kit and spare tube, a rain jacket, a wool cap, a small camera, a cell phone, and snacks. If your rain jacket gets wet you can secure it under the extra long top strap. Despite its volume it's fairly narrow and tapered toward the bottom, so you won't rub you legs.
We recommend attaching it to the saddle rails, rather than saddle loops, as this minimizes swaying and keeps the bag low and out of the way. A rear light can be clipped to the name patch."
 
* This item ships for free.