Female breast cage

breast helmet, comprising a wall (17), whose wall (17) in the deployed position presents a bell shape having a vertex (20) and said wall (17) delimits an internal space (16) opening at the base of helmet according to an opening delimited by an edge (18) of support opposite said apex hull (20), wherein said wall is an elastically deformable polymeric material, and in that it is adapted for autonomous deployment from a folded position to its deployed position under the action of elasticity of the single wall (17).