you can combine 15 minute sessions to do as long as you want.
it is currently only possible to book in one massage at a time (but you can book in right after). if you do not currently have an active massage session on your account you will be prompted with a range of pricing options. alternatively you can purchase a multipack option and then book it in at a later date. multipacks can be shared with friends and family and are valid for 2 months from the date of purchase. individual massage sessions are valid for 12 months from the date of purchase.