Sun block is not just for people of other races. Using a sun block with a minimum SPF of 15 will protect you from sunburn, sunstroke and premature aging, as well as skin cancer. Try the Menscience TiO2 Sun block SPF 30 for men ($31). SYL TIP: Apply sunscreen liberally to all parts of your body at least 30 minutes before going out into the sun. This will give you sunscreen time to be absorbed by your skin and be the most effective. Once out in the sun reapply every two hours, especially if youâ€™ll be swimming/toweling down.