Product Details Recommended by the Skin Cancer Foundation as an effective UV blocker, this second-skin rash guard provides UPF 50 sun protection—ideal when he's catching waves all day. Even better: We styled it with cool colorblocking so he won't put up a fight when it's time to put it on. But remember, nothing is 100 percent effective against sunburn, so keep sunblock on hand as well.

• Poly/spandex.
• Hand wash.