Geothermal Therapy Association (GTA) certifies members worldwide who have studied our CE approved Handbook and passed the written exam. This certification shows the client your commitment to safe and effective stone massage. This advanced education covers temperature related contraindications, stone and equipment sanitation, safe temperature ranges, professional ethics and hygiene. Membership dues support on going research and development for this highly effective wellness modality. The GTA board of directors are dedicated to promoting this professional massage modality while focusing on client safety. Visit www.GeothermalTherapy.com to join.