This is perhaps "the most important bikini ever," said Meredith Lepore at Food and Wine. Each suit ($167) in the debut swimwear line from Spinali Design of France features a removable sensor to help sunbathers avoid overexposure to UV rays. The waterproof sensor monitors temperature and sun conditions, adjusts its calculations to the wearer's skin tone, then sends an alert to her smartphone whenever it's time to apply more sunscreen. The customer can also choose a "valentine" alert, encouraging her partner to rub on more lotion.
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