We redesigned our 38L Carry-on Backpack to add even more comfort and convenience for the weary traveler. In addition to the option to convert it into a weekender duffel bag, the backpack now has pass-through straps that can be used to attach it to your wheeled luggage. It fits over most upright handles for a seamless travel experience. On top of that, the straps are easy to store, and we've added two padded electronics sleeves for a greater amount of space and a greater level of protection. Specifications Overall Dimensions: 13 x 7.9 x 19.7 in/33 x 20 x 50 cm Volume: 38L Laptop Sleeve Dimensions: 16.5 x 12.6 in/ 42 x 32 cm; travel laptop backpack fits for 15-inch laptop and some ultra-slim 17-inch laptops Airline approved size, designed to fit maximum size allowed on most IATA flights (please check carry on allowance policy for specific airlines)