$10 well spent

Wrist watch We’ve all been guilty of putting on sunscreen first thing in the morning and then forgetting to reapply throughout the day. But thanks to UVSunSense, this could be your first summer without getting burned. The plastic wristband (like ones you get at bars or concerts) changes color to reflect your amount of exposure to sunlight. The setup is simple: Place the band on your wrist and apply your sunscreen (including some on the band). It turns blue when activated by sunlight, and when the color starts to fade, it’s time to reapply your SPF. When the hue becomes yellow-orange, that means you should cover up or find shade. The bands can be used only once, and seven come in a pack. Now, what about that inevitable wristband tan line… $8 at teebop.com.

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