Screens out the sun's burning rays to help prevent sunburn. Provides protection from UVA rays that may contribute to skin damage and premature aging of the skin. Higher SPF gives more sunburn protection. Retains SPF after 80 minutes of activity in the water or sweating. Coppertone Sport High Performance Lotion is equipment for your skin. This ultrasweatproof sunscreen is ultra dry for a no-slip grip. Extreme conditions that trigger sweating (heat, humidity, vigorous exercise) can make skin more vulnerable to UV damage. Added antioxidants help replenish skin's natural defenses. Won't run into eyes and sting.