InSPAration Wellness Cooling Spearmint Aromatherapy Crystals are a refreshing fragrance. This product allows you to juxtapose the cool and crisp aroma of spearmint with the relaxing warmth of your spa. InSPAration products are safe for all surfaces and will not cause problems with plumbing or damage equipment. They can be used in any hydrotherapy environment as well as spas, hot tubs, Jacuzzi's, and whirlpool baths.