If you buy a new product it will arrive with a large amount of unneeded paper describing its use and care and lists of phone numbers and URL's that you may use to whine and complain. It is nearly impossible to buy any product in the US that does not include voluminous product information, disclaimers of liability stating the products suitability for use, possible components manufactured from materials that are possibly dangerous to health, a list of the materials that the product is composed of with individual disclaimers from the manufacturer of the materials.Okay now we're getting somewhere. I suspect they're stiff especially when new but this one has a noticeable notch or a very stiff spot every 180°.
There was no literature included in these though.
If you purchase a claimed new product that does not include 10 pages of small print it is likely not new.