Abstract: An article of clothing for enveloping the upper part of the body, particularly garments and undergarments of this type manufactured for men, women and children, having an extension to its back-piece in the form of a shaped flap of curved lower contour, provided with elastic means and with its concavity facing upwards, the flap being arranged to envelop and rest on and under the buttocks for the purpose of preventing the article of clothing riding up when the user bends forward or makes any large amplitude movement, the article of clothing being particularly adapted for sports and leisure garments.