Chicco Safe Hygiene Silver Ion Sponge is an ultra-hygienic and soft sponge. Enhanced with Silver Ions for Bacteriostatic Action This sponge is enriched with Silver Ions to help prevent bacterial growth, reduce unpleasant odors, and ensure lasting hygiene and cleanliness.  Ultra-Soft When Wet Made from a special material that expands on contact with water, making it exceptionally soft and gentle on your baby’s delicate skin. Returns to Original Shape When Rehydrated Naturally prone to shrinkage and weight loss when dry, the sponge will regain its original shape once wet again. Contains: Silver Phosphate Glass known for its effective antibacterial properties. Perfect for daily cleansing and gentle care of newborns and infants.