Long UVA make up over 75% of the UV radiation reaching earth and they are present all year round. They are known as long UVA due to their greater wavelenght: this means that they have the lowest energy but the greatest penetration range. The damage they cause reaches the deepest part of the dermis, acting like "invisible sunburn" in the short term, but representing a delayed explosion timebomb within skin.
1) Apply just before sun exposure.
2) Re-apply frequently and generously to maintain protection
3) Use sunscreen products that offer sufficient protection for your skin
4) Avoid sun exposure at peak hours. Over-exposure to the sun is dangerous
5) Do not stay too long in the sun, even while using a sunscreen product, because it does not provide you 100% protection