Hi ssb24,
Natura was founded by a father and son team Harry and Ralph Rossdeutscher and Ralph was the president until they went bankrupt and were purchased by Spring Air / Sommex. He was originally a vice president of Spring Air / Sommex after the purchase but has since left the company.
By “substantial enough” I’m assuming you mean “thick enough” and that would depend on how good a match the mattress was for you in terms of PPP.
That would depend to some degree on the quality of the support layers but in most cases the “weak link” of a mattress would be in the comfort layers not the deeper layers so at your weight it probably wouldn’t make a significant difference in terms of durability but could make a difference in the feel and performance of the mattress (see post #2 here about the difference between a latex/polyfoam hybrid and an all latex mattress). It doesn’t appear to have any obvious weak links in terms of durability though especially with your lighter weight. There is also more information about the factors that can affect durability and the useful life of a mattress in post #4 here and the posts it links to.
That would depend on whether it was legitimately a “cosmetic defect” (sometimes this is language used to describe defective or used mattresses that are a warranty or comfort return and are sold at deep discounts by liquidators), the nature of the defect, whether it still has a factory warranty. The “value” of a mattress depends on your personal value equation and on how the mattress compares to other similar mattresses that are available to you either in the area or online. If it really is a minor cosmetic flaw and the mattress still has a factory warranty and it compares well to other similar mattresses that are available to you then I wouldn’t have an issue with it.
In case you haven’t seen it … some of the better options and possibilities I’m aware of in the Cambridge, ON area are listed in post #2 here.
Google doesn’t show a “natur sleep” store listed in Cambridge … do you have a link?
Phoenix