One mistake would be understandable, however the BoingBoing/Stack Social store repeatedly violates the FTC rules when it comes to making claims about rayon sheets, calling them “Bamboo” to falsely make the fibers seem like a natural, mechanically separated fiber like cotton or linen rather than a semi-synthetic polymer creating using toxic chemicals to transform alpha cellulose into rayon. I guess so long as the underfunded FTC doesn’t sue Stack Social they will continue to break the rules because they can.
https://boingboing.net/2016/11/19/24-hour-sale-save-84-on-thes.html
https://boingboing.net/2017/02/10/the-eco-friendly-future-of-sle.html
https://boingboing.net/2019/05/10/sleep-like-a-baby-panda-in-the.html
https://boingboing.net/2020/01/19/get-deep-rest-under-these-hypo.html
Etc., etc., etc…
Here’s the wiki that explains the difference between mechanically separated bamboo fibers, which the sheets are not made of, and chemically processed rayon made from bamboo, which is indistinguishable from rayon made from other cellulose sources.