The Techonaut — two sizes: 45L (you are here) or 30L — is our largest airline carry-on backpack that combines style with ultimate functionality. Features include:  Three carry methods: backpack, shoulder bag, and duffel Skeleton back panel for improved airflow Top-loading, suspended laptop compartment with exterior access, fits 17” laptops and more 1 spacious main compartment, 1 large end pocket, and 3 quick-access exterior pockets 6 O-rings for optional organizational bags and accessories Breathable, supportive back panel for long comfortable as a backpack Comfortable, durable, edgeless backpack straps that can be tucked away when needed Rolling luggage handle pass-through pocket Maximum carry-on size for most U.S. domestic airlines