The shell is made of a TPU-coated 1000D polyester with a rubbery feel, and although it feels resistant to liquids, the backpack comes with a rain cover to ensure that your belongings stay dry while traveling. We loved its high capacity and thought the unstructured style was ideal for wedging clothes into every corner, maximizing packing space in the clamshell-style compartments. The Cotopaxi Allpa 35L Travel Pack earned our top pick as the best carry-on backpack with its perfect performance in all categories of our testing.
Salt Lake City-based outdoor gear brand Cotopaxi builds brightly colored clothing and accessories to last. There isn’t a designated water bottle holder.