What is SPF? SPF stands for sun protection factor. This rating is used to determine the extent to which sunscreens block UVB radiation. SPF 30 blocks 96.7% of UVB Rays, whereas SPF 50 blocks 98.6%. Let's discuss SPF in more detail. Here are some examples. What are the advantages of https://www.topscosmetics.uk/product-category/skincare/moisturisers/spf-moisturisers/