Based on my research, the fat boy is bigger, and is slightly cheaper. It's really up to the buyer if they prefer a more square shape (Jansport) or more round (High Sierra)
High Sierra - Jansport
High Sierra Access Backpacks can be purchased at Amazon, Dick's Sporting Goods, and eBags. One can also purchase High Sierra Access Backpacks directly from High Sierra.
You can find high Sierra backpacks at amazonhttp://backpacktobuy.com/wordpress/
The High Sierra brand of backpacks range in price depending on the backpack and the store. The recommended retail price is around $120 but they can be found as low as $40.
There are many different retailers who offer High Sierra backpacks. The official website of High Sierra offers backpacks for sale as well as Macy's, Sears, Amazon, and Dick's Sporting Goods.
The store Sierra Trading Post is well know for offering clothing and equipment for outdoor use. This includes things such as camping equipment, backpacks, and even kayaks. A large amount of their clothing is often water resistance and insulated to protect from the elements.
dickies, jansport, and high sierra are all good backpack brands
Sierra Student Coalition was created in 1991.
School bags purchased in Florida that are used by many students include a variety of brands. Popular brands of the bags include: Dakine, Jansport, and High Sierra.
Sierra Lee Sierra Ann Sierra Rae Sierra Elizabeth Sierra Clarie Sierra Nicole
Some expeditions have involved the use of helicopters. But for the average expeditioner, they can usually find locals living in a nearby village who are interested in helping ferry gear to the cave. These locals may have access to mules or donkeys. There are remote caves in the U.S. that can be reached using a 4-wheeler, but this is usually not possible on government owned land. It may be necessary to carry very heavy backpacks from the trailhead to the cave, or basecamp. This was necessary in the Sierra Madres back in the 1960's, before logging roads were built. They even used machetes to make a trail where there was not one.
Sierra Madre Occidental, Sierra Madre Oriental and Sierra Madre del Sur.