Try the latest spa treatment with these salt cave vouchers in Cambridge! The treatment involves breathing specially treated salt air to free your body of toxins. The concept is simple; think about how a clay mask purifies your skin by drawing out impurities. Salt therapy has the same effect internally; as you breathe in the salted air, impurities in your lungs and the rest of your body are drawn to the salt particles. They are then carried out of your body through your bloodstream. Salt therapy has many health benefits and increases overall wellness. In particular it is said to help asthma, hayfever and sinusitis. It's also beneficial for your nervous system, so it is a very relaxing experience.