I'm very prone to allergic reactions to skin products, and after many rashes, have found that I can only use physical sunscreens (zinc oxide/titanium dioxide) . They are generally not as easy to apply to chemical sunscreens and leave you looking a bit like a metal robot, so I generally just avoid the sun as much as possible. If I will be outside for any amount of time, I use Aveeno sensitive skin mineral sunscreen. It's not quite as greasy or reflective as some other physical sunscreens that I've tried plus it comes in 80 ml tubes, so I can take it in my carry-on when going on vacation. This is very important since mineral sunscreens are often impossible to find in certain vacation destinations. I've tried a couple of other physical sunscreens but they are just over the 100ml limit, so no good for travel. You would think that companies would learn that lesson by now and reduce 114ml to 100ml to make it convenient for travel.