If you would like to have a deep release of muscle tension, you may want to try the Pro-Tec foam roller. It is a great tool for stretching before and after runs. It promotes flexibility and Myofascial release - alleviating muscle and soft tissue tightness of the upper and lower back, IT band, hamstring, adductors, upper arm and much more!.
High density foam roller for stretching muscles and tendons, breaking down soft tissue adhesion, and soothing tight fascia while increasing blood flow and circulation to the soft tissues.
Foam roller instruction videos on pro-tecathletics.com