The expandable panel takes it from 43 to 46 litres, which I find useful on the way home.
55 cm, 43/46 L, blue (navy). The raw title is garbled in the source PDF (“American Tourist Aptos (Body) er Summerfunk”) — transcribed verbatim.
Full listing: American Tourist Aptos (Body) er Summerfunk – Spinner S, expandable hand luggage, 55 cm, 43/46 L, blue (navy)