A colloidal silver purifying travel spray to keep your space Oh.So clean and clear. Meet your ultimate travel companion. Colloidal silver keeps nasty airborne germs at bay while pure essential oils open your sinuses and help you breathe easy—even at 30,000 feet. Take along on the plane (or any other mode of transpo) to purify your travel experience. Spray in your immediate space—your fellow-travelers will appreciate the subtle scent.