SunSense Sport is especially formulated for use in sport, particularly water sports due to its 4 hour water resistance and non-greasy base. Blocks UV-A and UV-B rays and screens infra-red and visible light. Tested after immersion in water so you can be assured of SPF 50+ even after 4 hours in the water. Regular and frequent use helps prevent sunburn, skin cancer, premature aging and wrinkling of the skin due to sun exposure. Manufactured to pharmaceutical standard..