The tag has no usage guidance.

learn more… | top users | synonyms

15
votes
2answers
3k views

How harmful is the rising/setting sun?

Often, while hiking, my companions and I treat the very early/late sun as being less harmful (as far as skin cancer and UV radiation are concerned). For example, we might not apply sunscreen ...
13
votes
1answer
169 views

Is there simple guidance on sunburn risk associated with altitude?

When skiing, if the weather is good, I often come back with a better tan than if I have been at the beach. Obviously with altitude, there is less blocking of UV rays by the atmosphere. But how much ...
11
votes
2answers
1k views

Why does sunscreen not work all day?

All over the internet it says that sunscreen does not work all day, but does not say anything about why. Why does sunscreen not work all day? Does the matrials get destroyed by the UV rays? Or is it ...
6
votes
1answer
86 views

Best sun protection for swimming

When I am going swimming in the pool my skin gets tanned due to sun. Which SPF value is suitable for my purpose? Should I go for some specific ingredient, so that the lotion won't dissolve in ...
4
votes
1answer
117 views

What is SPF in sunscreen cream?

What is SPF in sunscreen creams? I go to 2500m-4000m altitude. What should I use? And I've heard that SPF more than 55 is not for men. Does more SPF mean more sun protection? What would be an ...
4
votes
2answers
264 views

Extra strong sunglasses for sensitive eyes

I have a damaged pupil that stays partially dilated. And regular polarized sunglasses which I am wearing over the regular glasses aren't working better than my prescription sunglasses. I have a new ...
4
votes
1answer
347 views

Does water in the sun get purified from or polluted by algae, fungi and bacteria?

We live at 27° latitude, about 200 metres above sea level and drink water from PET bottles laying around on the soil (SODIS method). They are filled with fresh water from a well and reused over and ...
2
votes
4answers
252 views

Wear a Shirt(and sunscreen) or (just) Sunscreen

Is it a viable practice to not wear a shirt, as long as you smear your body with sunscreen if you plan to go hiking for hours(assuming reapplication)? Or is it advised to wear a shirt at all times and ...
1
vote
3answers
210 views

Sunblock for clothing-optional camping

What should I look for in a suntan lotion for a nude camping trip? I don't know what to look for when it goes on the whole body. Are there any ingredients that I should watch out for?