The object of the invention is to determine the characteristics of a textile envelope (7) optimizing the deformation of living biological tissues (TBV), soft Z2 and hard Z1, according to the morphology and the needs of a treatment. The method comprises, A) a phase of determining a reference frame composed of tables giving, for several human morphotypes, for several parts of human bodies and for several types of biological tissues, the minimum and maximum values of the pressures that can be applied to this part of the human body by a textile envelope 7, B) a phase of adaptation of the envelope 7 to the corrective needs of defining the characteristics of the absorbent masses, respectively soft Z2 and hard Z1 in the compressed body examined, and the value minimum, maximum and deformation pressures to be applied to the soft and hard masses of the compressed body, and C) a phase of determining the manufacturing characteristics of the envelope 7 consisting, from the reference frame, of the subject and the action corrective, to determine the tension of the knitting yarns of the envelope 7 and the position of the zones of the envelope 7 providing an allo 7a, coming above Z1 areas of hard TBVs, and 7b providing short elongation over Z2 Zones of soft TBVs to optimize the behavior of these TBVs. L'invention à pour objet de déterminer les caractéristiques d'une enveloppe textile (7) optimisant la déformation des tissus biologiques vivants (TBV), mous Z2 et durs Z1, selon la morphologie et les besoins d'un traitement. Le procédé comprend, A) une phase de détermination d'un référentiel composé de tableaux donnant, pour plusieurs morphotypes humains, pour plusieurs parties de corps humains et pour plusieurs types de tissus biologiques, les valeurs minimales et maximales des pressions pouvant être appliquées sur cette partie du corps humain par une enveloppe textile 7, B) une phase d'adaptation de l'enveloppe 7 aux besoins correctifs consistant à définir les carac
