hydraSense Ultra-Gentle Mist with comfort tip specially designed for use in the nostrils of young babies. Try this product if your baby is having trouble breathing because of dry or obstructed nasal passages due to a cold or nasal congestion. hydraSense Ultra-Gentle mist is available in 100 mL and 210 mL sizes. hydraSense Baby Nasal Care products are an effective, easy-to-use method of comfortably cleansing nasal cavities and facilitating nose blowing. Products containing liquid are made of 100% natural-source, sterile, undiluted seawater solution that is exclusively sourced from the Bay of Saint-Malo in France - renowned for its strong currents, providing oxygenation and a wealth of naturally occurring mineral salts and trace elements.