These things are fantastic if you need to work long shifts alone in a boom or scissor lift. I used to avoid lift calls (a type of lighting work in film and TV) until a male supervisor cracked open a supply drawer and gave me one. He liked to send the Teamsters (big burly biker types mostly) to pick them up, so that he could put the women on the team in the air. Life changing. I ended up loving lift calls - hours and hours either driving these big fuckoff machines around or tucked up cozy in a sleeping bag watching Rick and Morty with a panoramic view of the whole city while the ground crew busted their asses. Highly recommended!

Also popular with pilots apparently.