Sun damage is the result of the effects of ultraviolet radiation (UV) on the skin. UVA and UVB radiation exposure is not limited to clear skies and hot summer days. Evan on a cloudy day more than 80% of UV radiation is able to penetrate through to the earth’s surface. UVB results in direct damage to the superficial layers of the skin (epidermis) and is responsible for sunburn. UVA is absorbed by the deeper layers of the skin (dermis) and accelerates the ageing process.