Acwell UV Cut Waterproof. A waterproof sunscreen made for intense or water-based outdoor activities. This sunscreen will not slide off along with your sweat instead it’ll create a protective barrier around your skin. A lightweight sunscreen with no white cast. Hypoallergenic tested. Suitable for all skin types & sensitive skin. How to use: 1. Apply at least 15 minutes before going out into the sun. 2. Reapply every 2 hours if you are outdoors.