Pro-TECT SPF 20 Sunscreen – medical grade, high quality lightweight sunscreen and moisturizer which competes with other SPF 30 and SPF 60 products on the market today. Use as your last treatment in the morning, under makeup if desired. This product is rub-proof, waterproof and last 24 hours. No need to reapply after water exposure. Combats UVB and UVA exposure better than Zinc Oxide, Titanium Dioxide and Parsol 1789. Directions: After you have completed your morning skin care routine, allow face to dry. Then apply to face, neck, chest or entire body as needed to protect against the negative effects of sun exposure.