What Is SPF?
SPF measures how much solar energy is needed to create sunburn on protected skin, comparable to the quantity of solar energy demanded to make sunburn on unprotected skin. As the SPF value rises, sunburn protection boosts.
SPF measures how much solar energy is needed to create sunburn on protected skin, comparable to the quantity of solar energy demanded to make sunburn on unprotected skin. As the SPF value rises, sunburn protection boosts.