This is a set of the L size "Toco-chan Belt II" and the M size "Pigeon Pelvic Belt for Postpartum Use." The Toco-chan Belt II has only been used a few times and is practically like new. There is no box or instruction manual, so please refer to the website for instructions on how to wear it. The Pelvic Belt for Postpartum Use has also only been used a few times, but there is some slight warping of the belt due to washing. There is no box or instruction manual for this item either. How about this set for lower back pain relief before and after childbirth, as a pelvic belt, or for a spare?