Conditions can be inhospitable at the foot of Mount Everest. Swirling winds blow snow and debris, overnight temperatures drop below zero degrees Fahrenheit, and the midday sun will burn uncovered skin and gear.

　　Our Everest correspondent, Ben Ayers, recently spent a month living at the Mount Everest Base Camp. During that time, Ayers tested a long list of gear, from boots and socks, to undergarments. In his latest video, Ayers discusses the gear that helped him live at 17,500: puffy coats, insulated pants, sunglasses, and sleeping bags.

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