The advice: "Fill up a handful of sunscreen and spread it all over your body" is used in several sun safety campaigns. The hope is that users in swimwear following the advice will apply a sunscreen quantity of 2 mg/cm\^2 to all accessible skin. The present study is the first to investigate how this advice works in practice.
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The overall quantities of sunscreen applied were calculated from the weighed amount of sunscreen used divided by the skin area accessible for sunscreen application.
Timeframe: Outcome measure will be assessed within half an hour after sunscreen application. There will be no further follow up.