If your looking for versatility, look no further. The Eagle Creek Morphus is essentially two bags in one! You can use it as a backpack, rolling luggage, or both. It has a durable polycarbonate shell to protect the back and the front bag unzips from it to create another full size bag. Even though it is eseentially two bags, it is very lightweight and strong. If anything happens to the bag, even if it was your fault or someone else, the No Matter What warranty covers it and they can either repair or replace it.