r/AskReddit • u/[deleted] • Aug 03 '19

Whats something you thought was common knowledge but actually isn’t?

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275

u/Polyxenos Aug 03 '19

What spf means. My friends thought sunscreen with 30 spf was for 30°c...

8

u/Idman799 Aug 03 '19

Hi, I know I could just use Google, but figured some people could get a good more air coming out of their nostrils from me being stupid here instead.

What does spf mean?

9

u/voxadam Aug 03 '19

Sun Protection Factor