35L Nylon Bag with Trolley Sleeve and Crossbody Strap

Rolling luggage can carry this bag for you. An integrated sleeve slides over the trolley handle so the bag rides on top of the suitcase through the airport. At 45 by 25 by 29 cm it is sold as small enough to go under a plane seat.

The nylon is high density and water resistant so a wet towel can sit apart from dry clothes. Carry it by hand or use the adjustable strap and wear it across the body. The listed capacity is 35L which suits a night or two away with room for a makeup bag.