The Back on Track Women's Boxer Shorts offer relief for groin problems, superficial hip pain or bladder pains due to the cold. The Boxer Shorts may even be helpful in relieving period pains. We have seen good results with hip pain in the superficial muscles and tendons known as the tensor fascia lata. In younger and middle aged people, problems in these areas tend to be the main cause of hip pain. The fabric is a smooth, thin polyester-cotton mix. The waistband is made of a wider elastic, with Back on Track printed on it. Comes in a range of sizes (Extra Small, Small, Medium, Large, Extra Large, XX Large and XXX Large).