What is SPF? SPF stands for sun protection factor. This rating is utilized in sunscreens to block rayons of UVB rays which are the primary cause of sun damage. SPF 30 blocks 96.7% of UVB radiations, and SPF 50 blocks 98.6%. Let's discuss SPF in more detail. Here are some https://www.topscosmetics.uk/product-category/skincare/moisturisers/spf-moisturisers/