I live in Phoenix as well. I recommend the HeadBlade stuff. Reason: IT DOES NOT CLOG YOUR PORES. the SPF 15 is strong enough that your head is protected, while you are still allowed to get some color. Depends on how much time you spend in the Sun. If your out for a day of it, the Coppertone stuff might be best, but chillin' on a boat in Havasu for two hours, I would use the headblade stuff. Peace