On the surface, it all seems the same. Why should you buy one sunscreen with SPF whatever over the other? SPF stands for Sun Protection Factor and measures how effective your sunscreen can deflect UVB rays. This keeps your skin from burning but will only provide some protection from cancer causing UVA rays as its only screening the sun to diminish its effects like a filter. However, Save Your Tattoo is a full-spectrum sunblock, meaning your are covered from both UVA and UVB rays completely. Our formula will help you keep your skin healthy and your tattoo as bright as they day you got it without leaving a white smear like older sunblocks.