Bike bags are invaluable for any cyclist, whether you use your bike to get around the city or like an occasional country trip. Depending on the design and size, a bike bag can hold your wallet, documents, keys, and other personal items. Manufacturers such as Ortlieb, Filmer, Force, or Strida offer a wide range of quality bike bags. They feature durable materials, precise seams, and are easy to attach and remove.