Chances are, if you’re a triathlete, you’ll be racing and/or training somewhere where you’ll need sunscreen, and the SPF number is not all you should be looking at. Race day is not a day to try and get a tan, so find one that works and load it on. Some athletes even carry a small bottle with them on the bike to re-apply half way. Sunburn to the skin hinders sweat gland function by inhibiting the body’s ability to cool itself, it is definitely worth paying attention to if racing in a place with intense sunshine.
What better place to test this stuff out then on the lava fields of Hawaii – so that’s what we’ve done. A few different trials and we’ve found the perfect answer. It’s extremely breathable, extremely water proof, and claims to be anti-aging (which by blocking UV and preventing skin damage is actually reasonable). The key ingredient is 3% Zinc Oxide in a product called Hawaiian Blend Sport Sunblock SPF50. We tried a couple others – Bullfrog works great, but not for long. Similar findings for Coppertone Sport. The worst was made by Banana Boat, even the sport sunscreen was very un-breathable and it makes you sweat from every pore. It also didn’t do much to block the sun after any time in the water.
Something with Zinc Oxide is by far your best bet. 3% is a good level, anything higher and you’ll be a white monster as it doesn’t rub in very well. If you have a hairy body you may want to look for something with a bit less zinc for that very reason. However, anything without it and it’ll be gone a few hours into the bike.
