If you’re thinking of heading out of the house without wearing sunscreen, think again. According to Skin Cancer.org, between 40 and 50 percent of people who live to the age of 65 will have either basal cell carcinoma or squamous cell carcinoma at least once. One way people can protect themselves from harmful ultraviolet rays is by using an SPF sunscreen, said Kathe Malinowski, lead esthetician and marketing manager for Eterna MedSpa & Laser Vein Center. And the amount of SPF, or sun protection factor, is important. “Wear a daily SPF of at least 30,” Malinowski said. “Remember to reapply when you are out in direct sunlight every couple of hours. If swimming, reapply after you dry off. Nothing is waterproof.” Reapplying is key, Malinowski said.