Abstract: A rucksack and shoulder bag has a storage bin with two opposite sides; a single continuous strap encircling the bin, the strap ends being attached to the storage bin on opposite sides at predefined attachment points. At least four loops are attached to the storage bin. The strap is led through each of the loops such that the strap may slide through the loops. The attachment points and loops are distributed such that the bag has at least two configurations: a first configuration wherein one of the attachment points and three of the loops define carrying points for two shoulder straps as a rucksack, and a second configuration wherein the strap extends diagonally across a top part of the storage bin between two of the loops located on the opposite sides, wherein the bag may be carried with the strap extending diagonally across the top part as a shoulder bag.