An article of clothing, in particular a protective vest, the size of which can be adjusted. At least one outer zipper with two rows of teeth is provided. The article of clothing has a first size in a closed state of the outer zipper and a second size in an open state of the outer zipper, wherein the first size is smaller than the second size. In the open state of the outer zipper, the rows of teeth are held together at a distance from each other by material which is at least partly covered by the outer zipper in the closed state of the outer zipper. An inner zipper with two rows of teeth is provided, said zipper being at least partly covered by the outer zipper in the closed state of the outer zipper and being exposed in the open state of the outer zipper.