Sunscreen was applied as prescribed by test instructions. A static SPF test was performed and our products were rated SPF 44.83. Testing was then initiated. Subjects were subjected to 30-minute intermittent periods in water using whirlpool at 75-80 degrees F, circulation jets on and jogging in place for the duration of immersion periods.
Tests were performed for 16 periods of alternating 30-minute immersions, 10-minutes out, yielding 8 hours (480 minutes) of immersion time. (80 minutes in and out of water is normal testing time on sunscreen/sunscreen products. Look for this information on the product.)