On shelves at a Humanetics facility in Huron, Ohio, skulls stare from their eyeless sockets, shiny and silver. Around a corner, a rack is filled with squishy, peach-toned arms, legs, torsos and butts.

This natural aid reportedly helps with sleep. Here's what to know and if it's the right fit for you. McKenzie, a Certified Sleep Science Coach and proclaimed mattress expert, has been writing sleep ...