Left leg numbness is one of the signs of a bulging disk in the lower lumbar area. Just a heads up, after you get everything as far as fitting is concerned, straightened out, if the numbness in the leg is down to the foot, be sure to tell your physician about this. Not trying to be an alarmist, something I learned the hard way when I had a spinal compression at 2 lumbar levels and lost use of one leg completely for several years.

Bill