I took this class today at IDI and it's amazing.  You can combine cleansers and exfoliants to bump levels, or create shorter treatments for people who want in & out.  Can also combine exfoliants with masks for the same thing.  The possibilites are endless.  I am so excited to try some of these new combinations in my treatment room.  These product combinations can really be customized to address the client's main concern and achieve amazing results.  I recommend this class to everyone who uses Dermalogica.