Hi farmhandluke,
There is more about the type and quality of the materials in the Casper along with Novosbed, Leesa, and Saatva and many of the other what I call “simplified choice mattresses” in post #2 here in the simplified choice mattress topic and post #1 in the same topic would be well worth reading as well.
None of the “simplified choice” mattresses disclose their exact return rates and it wouldn’t really be relevant anyway but there is also a discussion about Casper’s return rates in this topic that would be well worth reading as well.
Phoenix
PS: I have removed the advertising link that you added to your post and have also banned your mattress forum user account for spamming along with the other user accounts that you have used to spam the same link.