Bags are always a tricky thing. They are often too big or too small or don't fit in any other way. Honestly, don't you always have "one" bag too few? There are products that are unique in their kind and are not absolutely necessary for the life of a biker, but they are helpful. Ride has tested five such bags. They can all be used for more than just one purpose and are perhaps exactly the "one" bag that is still missing.