Kelty Hub Backpack - 3100 cu in TSA-approved carry-on size suitcase can also be used as a backpack Backpack shoulder straps, padded shoulder strap, two carry handles Expandable main compartment, zippered stash pockets Toiletry kit serves as internal compression, electronics clip-on point on shoulder strap 2600 to 3100 cubic inch volume; weighs 3 pounds, 10 ounces