The Center Section Four offers four inches of storage space and comes with a divider shelf attached to the side walls of the main compartment with Velcro. This shelf can be positioned right where you need it or removed for full access storing one or two headsets or GPS. This item does not include a Main Handle or Shoulder Strap. If building a custom bag, make sure your order includes one or both. Access is through a unique top zipper design that also opens the entire length allowing you to reach all the items above and below the divider shelf. On top of the bag is a pocket for sunglasses. There are two FLEX Mount Pocket stations, one on either side of the Center Section Four