A single-center, randomized, controlled, intra-individual comparison, open label clinical study to determine the 8-hour moisturization efficacy of a sunscreen lip balm. Skin hydration will be assessed before (Baseline) and after (2, 4, 6 and 8 hours post-treatment) a single treatment with test product, compared to 'no treatment' as control, using a corneometer. Study treatments will be randomly assigned to 2 test sites delineated on the skin of the participant's volar forearms (one test site on each arm). A 1-week conditioning phase will precede the test day, during which participants will use the soap provided for personal washing.
The purpose of this study is to evaluate the 8-hour moisturization efficacy of OTC sunscreen lip balm after a single treatment application.