Pocketable Water Repellent Boston Bag 75L Verkehrsakademie Group, Hamburg DE. A weekend bag with a compact, foldable design that makes it easy to store when not in use. When unfolded, it perfect fits inside a MUJI 75L Hard Shell Suitcase to be used as an organizer bag while traveling. It also works as a carry on Boston bag, providing extra storage space on the return journey when you have additional luggage. Made with a water repellent recycled polyester material so it can be used in all types of weather. The bag also features a luggage strap for your convenience, allowing you to easily secure it to your suitcase handle.