The present invention provides a jacket for swing training for a sport requiring swinging of a sports implement. The jacket comprises a body, a first arm and a second arm extending on either side of the body, a front, a back, an interior and an exterior. A first body band encircles the interior portion of the jacket by encircling the body and the interior of the first and second arms. A first wing portion extends from the first arm on the exterior of the jacket, the first wing portion being connected at one end to the first arm and at another end to the exterior of the jacket so that the first wing portion limits the movement of the first arm during a swing.