The insulted pouch from start-up company Phoozy will not interfere with your phone’s signal, wi-fi or Bluetooth, the producer’s claim, keeping you connected at all times.
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Not only is it handy on the beach but it also prevents freezing and so is ideal for keen skiers and snowboarders.
It has already been featured on the US show Shark Tank as well as The Today Show, while Forbes magazine described the bit of kit as “essential travel gear”.
The pouch uses Nasa spacesuit technology to reflect 90 per cent of heat away from your device to help it prevent overheating.
While it also insulates our device in cold temperatures to extend batter life by as much as three times.
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It also provides shock protection from drops of up to six feet, while it’s water-resistant, splash-proof design floats if it is dropped in water.
The fancy kit normally retails for £24 but Amazon is currently selling it for half price, at £12.
The pouch comes in two sizes – medium or large – so most phone models and makes fit comfortably inside.
Customers are generally happy with their purchase, with 65 per cent of 511 online reviews giving it five stars.
One wrote: “Nothing worse than going out in the sun and trying to cover your phone so it’s not getting too hot.
“This little pouch works great!! Can’t wait to try it in the winter as it’s supposed to do the same for cold temperatures as well!”
Another said: “Great for the beach, keeps my phone going on a hot day. Gave them as gifts for a Girls’ weekend and everyone loved them!”
While a third added: “While watching Shark Tank, this product was being presented to the Sharks.
“I had been having trouble with my iPhone getting too hot out on the boat and in the car.
“We were going to Cancun so I bought two. So glad I did!
“They actually work. I bought one for my husband also. The phones were cooler and the battery did not run down as fast.
“In fact our friends ordered two while sitting on the beach. We had several people stop and ask us about them.
“Our experience is that this product is worth the money! Very happy with our purchase.”
It comes as the best beaches in the world have been revealed, with four of them in the UK.
There’s a corner of Spain where the beaches and the nightlife both have a reputation for being a bit wild.
Meanwhile, there are currently thousands of beach holidays which cost less than £190pp this spring – including Spain, Turkey and Portugal.