The $5000 sleep device that tech billionaires swear has led to their success

It is the gadget that billionaires Elon Musk and Mark Zuckerberg swear is the key to their success.But this £5,000 piece of tech isn't some cutting-edge supercomputer or AI-powered robot assistant.Instead, billionaires and Silicon Valley elite are forking over thousands for high-tech mattresses to optimise their sleep.Eight Sleep, the startup behind these pricey smart beds, claims its mattresses can give you 25 per cent more deep sleep and even cure your snoring.The company's Pod product consists of a sensor-packed mattress cover which connects to a large 'hub', alongside an adjustable base.