The installation consists of an unusual punching bag, different from a traditional bag in that it is an empty and transparent envelope: a fragile presence. The ambiguity of meaning that characterizes this element is also celebrated in the performative moment: a Thai boxer hits the empty bag for hours, constantly finding himself forced to adapt his movements to the impact with a surface that cancels the effectiveness . of its action. At the end of the fight, all that remains concretely in space is the punching bag, engraved on the surface by the blows and sweat of the puffer. On the ground, the hand bandages used during his fight with the void. The work stems from the artist's experience with Thai boxing and reflects the complexities experienced. During the first exhibition of Untitled, the exhibition space was simultaneously inhabited by the sounds of three audiovisual works focused on the practice of boxing, which overlapped and merged with the sounds produced during the performance.