Garment (1, 101) comprising a t-shirt (1a, 101a) and a system (3, 103) to correct the posture of a user comprising a first elastic strip (5, 105), a second elastic strip (6, 106) and a third elastic strip (7, 107). Each elastic strip comprises a first end (5a, 6a, 7a, 105a, 106a, 107a) and a second end (5b, 6b, 7b, 105b, 106b, 107b), a panel (4, 104) arranged on the back (1a2, 101a2) of the t-shirt (1a, 101a), a coupling system (8, 108) which can be coupled to the panel (4, 104) and provided with a plurality of retaining means (9, 109) for the elastic strips (5, 6, 7). The garment further comprises a first fastening portion (18a1) arranged on the upper portion of the torso between the left shoulder and the neck, a second fastening portion (18b1) arranged on the upper portion of the torso between the right shoulder and the neck, a third fastening portion (18a2) arranged at the height of the left hypochondrium, a fourth fastening portion (18b2) arranged at the height of the right hypochondrium, a fifth fastening portion (19a) arranged on the left side, a sixth fastening portion (19b) arranged on the right side. A first end (5a) of the first elastic strip (5) is fastened to the fourth fastening portion (18b2). The central portion (5c) of the first strip engages the retaining means (9) of the coupling system (8). The second end (5b) of the first strip (5) is fastened to the sixth fastening portion (19b). A first end (6a) of the second elastic strip (6) is fastened to the third fastening portion (18a2). The central portion (6c) of the second strip engages the retaining means (9) of the coupling system (8). The second end (6b) is fastened to the fifth fastening portion (19a). A first end (7a) of the third elastic strip (7) is fastened to the first fastening portion (18a1). The central portion (7c) of the third strip engages the retaining means (9) of the coupling system (8). The second end (7b) is fastened to the second fastening portion (18b1).
