Backpack ideal as under seat luggage, for low-cost flight. Essential and urban design, made to avoid excess baggage fees. It is capacious and can be makes smaller thanks by the side compression straps. The shoulder straps are breathable, adjustable and equipped with chest belt and whistle emergency buckle. The backpack has an adjustable waist belt that can be easily removed. Between the shoulder strap it has an handle, a second padded handle is on the backpack side. Frontal vertical pocket, frontal tool loops, pocket on the hood and pocket/divider inside the backpack.