The High Sierra(R) AT3.5 22" carry-on with daypack "carries" a lot of weight! With a removable daypack, this Duraweave bag is a great option for someone who only wants to carry one bag when traveling, but still needs the convenience that a backpack offers. A wheeled bag, backpack or daypack, it's still sized as a carry-on with an easy-access front zippered pocket at the top. Measuring 22" H x 13.5" W x 9" L, its daypack measures 16.5" x 12" x 5.75"!