While visiting our friends at Hiawatha Cyclery this summer in Minnesota, I picked up a Frost River Seat Bag for my classic Mercian Road Bike. It’s the perfect size for a day trip, or credit card touring. Here’s what I’ve been keeping in my seat bag. (Crank Bros Pump, Tire Levers, spare 700c tube, patch kit, Genuine Innovations Air Chuck & Two CO2 cartridges. There is also plenty of room for snacks, a light jacket, wool gloves, keys, wallet and a cell phone.) I dig the classic look of a canvas bag, and I’ve found it holds significantly more than the more prevalent mini-nylon seat bag I often spot around town. This Frost River Bag is pretty spendy with an MSRP around $80. For Barney Big Dummy I’m testing out a more affordable canvas seat bag made by Minnehaha Bag Company. The stitching and quality appear to be just as nice, but the MSRP is a more palatable $44.99. What about you? What’s in your seat bag?