Best Carry-on Travel Backpacks | The Strategist。?✈Perfect Carry On Backpack Size: Fits overhead and under the seat when traveling by air. Most airlines (such as United, Frontier, Spirit, JetBlue, Southwest and Delta) recognize it for carrying personal items. ?✈Well-Partitioned Storage: Large 40-liter capacity, two front pockets, side pockets and a 20-inch laptop pocket with foam padding, and a main compartment with mesh pockets and luggage compression straps to keep your travel gear organized and easier to find. ?✈Comfort and Portability: Breathable and comfortable shoulder straps and chest strap (adjustable up and down on the chest) can reduce the pressure on the shoulders; Luggage straps can secure the backpack to your suitcase/luggage for easy carrying. Thickened carrying handles on the top and sides of the suitcase backpack are suitable for long time carrying use.