The Xperia acro S has a scratch-resistant display to offer protection against dust and water immersion.

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Xperia advance has a scratch-resistant display with wet finger tracking to offer functionality and protection against dust and water immersion.

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Half were randomly to be instructed to apply the sunscreen daily to exposed areas, reapplying after water immersion, heavy sweating or several hours spent outdoors, while half were told to use it as they normally would.

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Deaths associated with immersion in cold water have been attributed to hypothermia, since many of those who die are judged to be competent swimmers.

BBC: Cold water increases drowning risk

Bolton said experts had been surprised investigators were able to recover 100 percent of the data from the recorders, despite their lengthy immersion in sea water.

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But what we really care about here are the IPX5 and IPX7 waterproof ratings, meaning this 7.9mm-thick Android's been tested against small water jets and one-meter immersion, respectively.

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The cards can take the kinds of punishment that we often associate with rugged gear, such as temperatures from -13F to 185F, immersion in 3.3 feet of water for half an hour and the usual steep drops.

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Its polymer technology also carries the potential for other application markets, including water desalination, ultra-capacitors and energy generation, chemical and biohazard resistant fabrics, and immersion coatings.

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