PYRO Sea Salt Spray contains filter-purified (sterile) Pacific Ocean seawater used to grow marine microalgae (Pyrocystis fusiformis). All the algae are removed, and the water is filter purified and UV sterilized. Along with the astringent benefits of seawater, the microalgae secrete polysaccharides that benefit the healing and nurturing of our skin. 4 OZ glass bottle. Microalgae extracts in seawater are excellent at hydrating, revitalizing and toning the skin and can also help to reduce problems with acne and even wrinkles. Microalgae has been used to improve the skin's elasticity.