Offers immediate comfort (no stinging upon application) and protects your eyes from dryness and irritation for a long time.Preservative free & Phosphate free, Emulgator free and Lipid free. There is nothing on the market like this. Contains 0.5mg/ml Sodium Hyaluronate, 20mg/ml Ectoine, a borate buffer and water. Ectoine is a natural substance that has a strong water-binding capacity. It forms a shield over the front surface of the eye to protect from allergens, inflammatory mediators and stabilizes the tear film. Sodium Hyaluronate improves the lubrication of the eye surface in eyes that are dry, burning or have foreign body sensations due to environmental conditions including after ophthalmo-surgical interventions. It can be difficult to differentiate between an allergic eye and dry eye thus the dual mode of action of Hylo Dual is advantageouis. Hylo Dual can be used while wearing contact lenses. Suitable for adults and children 6 years and older. 10 ml bottle (300 eye drops).