BoardingBlue Personal Item Laptop Backpack for America, Spirit, Frontier Airlines (Black) 2 Day Shipping Airlines Persional Item Laptop Backpack Overnightor Material: Heavy duty 600D polyester water-resistant. Multiple pockets for different funtions Backpack size: 18"x13"x8" *Light weight: 1.28lb This is a soft material bag custom-made according to the restrictions from the relative airlines. OVER-PACK MAY CAUSE THE BAG OVER-SIZED NOT TO FIT IT INTO THE "checker".