First of all this is not a SPF and you should not expect it to do this job
iI is a concentrated range of antioxidant oils which neutralise the damage caused by UVA from the sun which increase the free radicals around the cells and is responsible for cell premature ageing/cell mutansion (cancers) and invisible damage to new forming cells. Such long range photons can by pass many spf's and go through umbrellas, hats, clothes, windows and water.
It does not stop you from getting burnt from UVB on the skin surface which are mostly dead cells anyway so don't mutate but still have pain receptors
So its not suitable to sunbath or be in direct sunlight for long periods care should be taken to get shade regularly and build up you melanin (tan) in your skin which is the skin way of protecting itself against the burn of UVB
What it does allow is absorbance of vitamin D which spf's don't... and if you are sensible and take regular care to get shade, wear hats etc which blocks out UVB then you can be free of using spf's which are full of many skin irritating and cell damaging chemicals .
The best form of sun care is little and often with lots of shade, do not lay out for long periods of direct sunlight and you will find not only that you don't burn but also your skin melanin will come through giving a nice healthy tan and without the very harsh chemicals in spf' being on the skin. you can use it under a chemical spf if you so wish giving a barrier to the chemicals in spf .
Why Natural Oils? Vital oils, unlike creams, can penetrate into the lower layers of the skin making them the most effective skincare protection to oxidative cell stress Vital Oils are rich in Essential Fatty Acids (EFAs) and subsequently prevent premature ageing. They contain minerals like omegas, proteins and beta-carotene, which slow the ageing of cells., which aids cell regeneration.
Grapeseed (Vitis vinifera) Peach (Prunus persica) Avocado (Persea gratissima)