Thisworks perfect skin defense spf 30 intelligent skincare with proven natural actives for visible results proactively protects against ageing and uv damage modern it is important to wear sun protection in urban areas as much as on the beach there is a common acceptance that uv rays are the biggest cause of ageing and therefore this works promotes a proactive no nonsense attitude to skincare by adding an spf when you need it reduces the use of unnecessary chemicals on the skin