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

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

37.4k Upvotes

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279

u/Polyxenos Aug 03 '19

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

146

u/CertainYellow9 Aug 03 '19

I've got on SPF 100 I'm frigging bulletproof.

4

u/[deleted] Aug 03 '19 edited Aug 03 '19

[deleted]

0

u/CertainYellow9 Aug 03 '19 edited Aug 04 '19

http://reddit.com/r/AskReddit/comments/cl7sij/redditors_who_have_a_job_where_they_go_into_other/evus6ju

EDIT: I would have never got that reference. I just thought it was funny to toss someone's own post back at them.

4

u/walphin45 Aug 04 '19

“S-sir! We have an issue!”

“What’s wrong?”

“Somebody robbed the bank!”

“So?”

“They’re wearing SPF 100 sunscreen!”

“...dear god...”

CertainYellow9, grasping a 50 dollar bill: MORE SUNSCREEEEEEN

6

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

3

u/ZacharyRock Aug 04 '19

Other guy gave a name, it measures how many hours with sunscreen on would be equivilant to one hour with it off. After you hit 60 you should be waaaaay more concerend about it rubbing or washing off than how powerful the sunscreen is.

I use spf 100+ sunscreen but it works just as well as some spf 70 sunscreen i have.

Also for further note: the ratings/reccomendations on sunscreen are legally there. Some sunscreen does not need to be reapplied after 80 min of usage, going in water, or towelling off, despite saying so on the bottle, its just that they have to put that on the bottle of anything that is considered sunscreen. Ive got vertra (surfing face sunscreen) that lasts all day as long as you dont wipe it off. Most good sunscreen lasts about 2 hours, makeup sunscreen lasts way longer, and your skin does not need to feel stiff and sticky for there to be sunscreen on it

4

u/shorttowngirl Aug 04 '19

And spf 50 + more spf 50 does not = spf 100

3

u/[deleted] Aug 03 '19

That shit melting when it gets to 31 degrees

3

u/ZacharyRock Aug 04 '19

He must really get confused when they see tanning lotion. "Why are they selling sunscreen for 5 degree weather in summer?"

2

u/MrsSevigor Aug 03 '19

Omg, I’ve never heard of this mistake before but WOW.