This is a good list of internal frame backpacks.#break#First site I found on internal frame backpacks.#break#I'm surprised to see that some sleeping bags are more expensive than these backpacks.#break#Internal frame backpacks are the only types of backpacks I ever use for hiking.#break#The video at the bottom on the benefits of using internal frame backpacks is helpful.#break#Why you anyone use anything other than the internal frame backpack.