Abstract: A transformable article of clothing having a tubular element and an extensible tubular member to provide for a lengthening effect of the tubular element; the extensible tubular member is fixed to the interior of the tubular element so as to extend freely from the inside of the tubular element and includes three sleeves joined together. One sleeve is an upper sleeve which is joined to a lower sleeve through an intermediate sleeve by a first rapid-fastening device. The intermediate sleeve includes two tubular sections joined to each other in a separable manner by a second rapid-fastening device with one section being joind to the lower sleeve, the second section being joined to the upper sleeve, so that the lower sleeve can be changed in color, removed, lengthened or shortened.