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The makers say their latest design 'creates an instant dry habitat that is ideal for outdoor sports enthusiasts, people living in areas prone to natural disaster, sports fans who will not be held back by a little rain, and anyone else in need of shelter.'

Billed as the 'worldâ€™s first all-in-one waterproof jacket, sleeping bag and tent' the JakPak looks more like a bodybag found in an opening scene of the CSI TV series.

While the jacket that opens out into a tent may win a few awards for ingenuity it is unlikely to be heralded for its style. Particularly as it comes in two-tone green or black unless you opt for a custom-made colour.

But the Â£163 jacket, which goes on sale this spring, does have its fans, and on the firm's Twitter page one wrote: 'A clever all-in-one jacket, sleeping bag and tent. Great for those likely to get lost?'

JakPak's website says: 'JakPak is the only portable personal sleeping system on the market designed for outdoors and sports enthusiasts, as well as emergency preparedness.'

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More than just a coat ... The waterproof can be turned into a one-man 'tent'

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Ahh, this looks like a good spot to rest my head. The model unfolds the sleeping bag from the back of the coat

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After unzipping it he clambers in and then fastens it. Behind the coat's hood is another hood which when supported by metal rods provides protection for the head

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A mosquito net folds out, and now time for some shut-eye

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