The best cleaner for all types of optical lenses. Patented clear carbon formula absorbs dirt, dust and grime. Unique lens cleaner with dual sides - one with a retractable goat hair brush to brush away any loose particles and the other side with a self-replenish able carbon-based tip to clean the lens. Also comes with caps to cover both ends. Nothing cleans better. Outperforms all other cleaning devices. Safe for all types of lenses.