This super-sized backpack lives up to its name. Along with
various useful compartments, it has two extra features that
users will appreciate during long backpacking: three different carrying modes (backpack, sling, tote) and a flat bottom that
prevents tipping when set down

Specifications

• Main compartment has padded sleeve with elastic strap with hold down for storage of Laptops up to 17".
  
• Sunglass/ Pencil Case Pouch, Water Bottle Holder &
  Organizer Unit
• "Turtle Shell" Back Padding
• Extra-Stiff 900 Denier Polyester with Water-Resistant
  PVC Backing
• Dimension:  18" x 14" x 8"