erythem method
A regimen of dubious reputation for supposedly avoiding/minimizing the risk of sunburn that entails careful "spacing" of your periods of time in direct sunlight, and limiting your length of exposure each time. May or may not be successful/effective, depending on how sensitive your skin is, and/or at what latitude you live.
That bu**s**t erythem method may work for some people, but all it did for me was make me red as a lobster and miserably hot and scratchy while tossing and turning in bed at night!