Originally Posted by
CliftonGK1
I like Coppertone Sport spf-70. It doesn't sweat off as easily as others, so I don't end up with it in my eyes. I carry a little Nalgene squeeze bottle of it in my handlebar bag so I can goop up every couple of control stops.
Being chrome bald, I wear either a cap or other helmet liner so I don't burn my dome. If it's crazy hot and sunny, I've taken a cue from another guy in our club and I wear a bandana to cover my neck.
http://www.dermatology.ucsf.edu/skin...Sunscreen.aspx
The SPF rating indicates how long a sunscreen remains effective on the skin. A user can determine how long their sunblock will be effective by multiplying the SPF factor by the length of time it takes for him or her to suffer a burn without sunscreen.
For instance, if you normally develop a sunburn in 10 minutes without wearing a sunscreen, a sunscreen with an SPF of 15 will protect you for 150 minutes (10 minutes multiplied by the SPF of 15).
Or for a SPF of 70 you would burn after 700 minutes. That is over 11 hours! You are likely to sweat off the protection before it wears off.
Anything over SPF 30 is over protection.