A shoulder brace traction system uses a torso fitting part to be worn by a user in combination with an upper arm fitting part to be worn by the user. The upper arm fitting part includes an extension overlay that extends and covers the shoulder cap of the user. The extension overly includes front and rear shoulder straps connected to an intermediate portion of the extension layer. These shoulder straps connect with and/or on the torso fitting part on front and rear portions of the shoulder. The extension includes two further straps adjacent the shoulder cap that engage front and rear central anchors on the torso fitting part. The brace traction system is effective for many athletes and is cost effective to manufacture.