What is SPF? SPF stands for sun protection factor. This rating is used to determine how sunscreens block UVB radiation. SPF 30 blocks 96.7% UVB radiations, and SPF 50 blocks 98% UVB rays. Let's discuss SPF in more detail. Here are some examples of SPF. What are the benefits of https://www.topscosmetics.uk/product-category/skincare/moisturisers/spf-moisturisers/