Expires 4 or 6 months from date of purchase. However, the value never expires. You may use the value of any expired discount session towards the purchase of a session at the retail price. Essentially, the value of any unused discount session becomes a "coupon" after the expiration  date.

                               The 'value' per session:

                               6 session package:  $75

                               4 session package:  $80