https://www.cnbc.com/2019/08/18/there-are-now-175-online-mattress-companiesand-you-cant-tell-them-apart.html https://www.cnbc.com/2019/08/18/there-are-now-175-o

https://www.cnbc.com/2019/08/18/there-are-now-175-online-mattress-companiesand-you-cant-tell-them-apart.html https://www.cnbc.com/2019/08/18/there-are-now-175-online-mat... mentions that most of the online companies outsource their design and production to one of 4 producers.