The luxurious G20 spa in Back Bay is the largest all-encompassing spa in Boston! Enjoy a spa day with the following services:

• Salt Cave Halotherapy: Experience the benefits of halotherapy, or dry salt therapy, in the comfort of our beautifully appointed Salt Cave. The walls of the cave are created with pure Himalayan Salt stones and softly lit to enhance their beauty. This creates a negative ion environment which is what we experience at a beach, waterfall or in the mountains. These ions may have a positive effect on mood and energy. 


• 30 Minute Flotation Therapy: Floatation therapy creates a weightless environment which allows the body to completely relax while floating weightlessly on top of a saturated solution of Epsom salt and water. Floating allows the spine to decompress calming the nervous system, the muscular system to relax, improves circulation, promotes detoxification, and encourages overall relaxation in the body.


• Rasul Purifying Ritual: Five self-applied Rasul muds, customized for the body, detoxify, purify and replenish the skin with minerals during herbal steam treatment. A cooling mist and tropical rain follow to conclude the service. This experience is complemented with color light therapy to stimulate self-healing and promote total body relaxation.