I wanted a tinted stick that was reef safe and had staying power, so I pulled the trigger on the Sahara shade. I've been surfing this most recent south swell at a certain San Diego canyon break. After 2+ hour sessions, the sun-screen still wiped off on my towel, which proved it's staying power. Unburnt and I don't look white-ghostfaced when I go to get my post-session burrito. However, be warned, if you're precious about your towels maybe have some wipes or a separate face towel if that'll bother you. I'll recommend this stuff to the rest of my surf club.