Full screen, does it exist?

"No. The term « total screen » is prohibited for sunscreens, because none, even with a high SPF, can block 100% of UV rays. Note: SPF 15 blocks 93% of UVB, SPF 50 blocks 98% Also read: Diet and tanning, is there a link? Self-tanner, how does it work? Monoi, its benefits!"