The Back on Track Long Johns offers relief for groin problems, superficial hip pain or bladder pain caused by the cold. The Long Johns may even be helpful in relieving period pains. We have seen good results when hip pain problems are linked to the superficial muscle and tendon known as the tensor fascia lata. In both younger and middle-aged people, inflammation of this muscle is often the cause of hip pain. The Long Johns are available in a smooth, thin polyester/cotton mix fabric. The waistband is made of a little wider elastic, with Back on Track printed on. Comes in a range of sizes (Extra Small, Small, Medium, Large, Extra Large, XX-Large and XXX-Large).