A fashion item (100) including a thin wall with locally and selectively expandable areas including: an internal core (30) made of a lining material which can expand in contact with a liquid; a support layer (10) having an external face (11) opposite an internal face (12) on which the internal core (30) is arranged, the support layer (10) being configured so that the expansion of the lining material does not substantially cause its deformation; and an impermeable covering layer (20) attached to the support layer (10) so as to tightly enclose the internal core (30), the layer including one or a plurality of through holes (21) opening onto the internal core (30) and arranged relative to each other so as to form a predefined matrix, the covering layer (20) being configured such that the expansion of the lining material substantially causes its deformation.