Scar tissue is different to normal skin. Scars are less resistant to ultraviolet rays and are much more prone to sunburn. Prolonged sun exposure on sensitive scar tissue can also permanently darken a scar, especially in people with darker skin complexions. Scars should be protected from prolonged, direct sun exposure year round, not just during the warmer summer months. Mederma Scar Cream contains SPF 30 and is clinically shown to visibly reduce scars while protecting them from additional sun damage.