It was wrapped over, like a book sort of, in a soft cloth.
https://www.backyardchickens.com/t/682927/egg-incubated-on-heating-pad-from-day-13-to-day-20-hatches
https://www.backyardchickens.com/t/682927/egg-incubated-on-heating-pad-from-day-13-to-day-20-hatches

