Think Tank ~ Lightning Fast - Flash Case Zippered pocket for extra batteries Seam-sealed raincover: Unique to Think Tank Photo, all of the rain covers are seam-sealed for protection, similar to outdoor clothing and jackets. This is necessary to prevent the water from leaking into the bag where the raincover is sewn together Removable padded insert & dividers: The dividers can be removed from the insert and reattached inside of the bag. Some items like teleconverters, batteries and other photographic and computer accessories simply don't need much protection, so you can reduce the bulk of the bag by taking out padding Attaches to Pro Speed Belt: The Modulus components can be attached to the Pro Speed Belt and can either "rotate" or "lock" on the belt. In this photo, the Speed Changer has been rotated directly over the front pocket for convenience and comfort Attaches to Speed Belt Packs: It can be attached to the waistbelts of the Speed Demon, Freak, or Racer, for added capacity