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CAR man­u­fac­turer Nis­san has in­vented a sweat-sens­ing seat that can tell when driv­ers are de­hy­drated.

De­hy­dra­tion oc­curs when your body con­tains less water than it needs. It can af­fect con­cen­tra­tion and make you more tired.

Ja­panese firm Nis­san says that driv­ers make more than dou­ble the num­ber of mis­takes if they’re de­hy­drated – but that most driv­ers don’t recog­nise the signs of de­hy­dra­tion. A 2015 study showed that mis­takes made by de­hy­drated driv­ers in­clude late-brak­ing, drift­ing within a lane and even cross­ing lane lines.

So Nis­san and Dutch de­sign com­pany Droog have re­vealed a car seat called SOAK. The seat changes colour if the driver’s body sweat is high in salt, which is a tell­tale sign of de­hy­dra­tion. The driver then knows they should take a water break.

This new tech is ex­cit­ing, but there are no plans yet to bring the SOAK seat into pro­duc­tion.

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