What is the function of an after-tan lotion?

The correct answer highlights the primary purpose of after-tan lotion, which is to hydrate and prolong the tan while soothing the skin. After tanning, whether from UV exposure in a tanning bed or the sun, the skin can become dehydrated and may feel tight or irritated. After-tan lotions are formulated with ingredients that help replenish moisture, reducing dryness and enhancing the skin's overall appearance.

Moreover, these lotions often contain ingredients that can extend the lifespan of the tan by encouraging even fading and maintaining color. Therefore, their soothing properties also help in calming any irritation that might occur due to tanning, making them an essential part of the post-tanning routine.