With potassium, a component of natural tears. The extra gentle, pH-balanced formula for rinsing and storing soft contact lenses. Stock up and save. No sorbic acid and no thimerosal. Sensitive Eyes Plus Saline Solution has a gentle, pH-balanced formula which contains potassium, an ingredient found in natural tears. Satisfaction 100% guaranteed (details inside). Use renu fresh multi-purpose solution to clean, rinse, disinfect, store, and remove protein from your soft contact lenses daily. www.bausch.com. Made in USA.