The Pickwick is a versatile canvas roll-top backpack. Brooks says that it "epitomizes an urban journey by bicycle," which is great, but I think it is just an excellent backpack. I used mine for traveling in Europe by foot. The Pickwick is made from water-resistant canvas with leather trimming. It has a couple of hidden pockets on the bottom and side for safekeeping some of your belongings. I love this bag. It is Brooks' number one selling bag. You will love it. This is the large (regular) size Pickwick.