A posture loop includes an elastic band or cable having two end portions, a retainer bridge having a bar, the elastic cable includes an intermediate portion engaged with one end portion of the bar, and the end portions of the elastic cable are engaged with the other end portion of the bar, and two buckle members are attached to the end portions of the elastic cable for adjustably coupling the end portions of the elastic cable to the other end portion of the bar and for forming an eight (8)-shaped structure for the posture loop and for engaging onto shoulder portions of a user, The buckle members each include two grooves formed by a rib for engaging with the end portions of the elastic cable respectively.
