CabinZero ADV 42L Carry On Backpack - Absolute BlackKey Specs Capacity: 42 litre 55 x 35 x 20 cm Weight 1. 4 g Laptop Size: 12" to 17" 10 Year Warranty Description Introducing the CabinZero ADV 42L Backpack. Packed with all the signature features that make CabinZero the best lightweight carry on backpack. This version is packed with features, not only does this have 42L of packing space, but you can also fit your laptop inside. Check out the long list of features below. Side compression straps D ring