Daypack: A Daypack holds everything you might need for a one-day outing. The size you choose should be based on how much you want to take along. Some full-sized backpacks come with a detachable section that can be used for day hiking separate from the main pack, and is a more economical solution as long as you intend to go on more lengthly hiking trips.

External Frame: External Frame backpacks hold more than a daypack. Typical external frame packs have a type of vinyl canvas material 'bag' attached to a lightweight metal frame. This kind is more than adequate for younger age groups, but may require modification to fit a smaller framed person. There are a wide variety of sizes available.

Internal Frame: This kind usually holds more than an external frame, and tends to be more comfortable, and easier to adjust for body size. Internal frame packs have an internal structure to support the pack, with minimal space taken up by metal frames. They are a more efficient pack in that there is more room inside (and generally outside too) for your gear.