The Healthy Back Bag was developed with the help of a doctor and a chiropractor to determine just how the ergonomics of the bag could best reflect the requirements of the spine. The bag's ergonomic trademarked teardrop shape and the organization of the internal pockets make the weight feel lighter by redistributing the bag's center of gravity, all while relieving stress on the neck, shoulders, and back. Different sizes cater to different body types and the intelligent pocket configuration spreads weight around the bag and helps to organize your life.