SPF 30 vs SPF 50: SPF 30 for daily life, SPF 50 for beach days

SPF 30 blocks about 97% of UVB rays, SPF 50 blocks about 98%. For daily commuting or walking the dog, that extra 1% doesn’t matter, and SPF 30 is easier to wear consistently. For direct sun at the beach or pool, grab SPF 50 for a stronger buffer against missed spots and reapply every 80 minutes. Skip SPF 100 — the extra protection is negligible.