Hi Shecki,
As Joey mentioned … they are just emerging from a bankruptcy so there are retailers who are continuing to carry them and others are taking a more wait and see approach. This also means that there may be some who are looking to sell their stock and may have better value than normal because while Natura tends to use good quality materials … they are also quite pricey in an “apples to apples” comparison with other mattresses. There’s a little more information about the Serene in post #11 here. You can also see the layering on the Natura website here as well although they don’t disclose the density of the polyfoam they use.
As Joey also mentioned … plant based foam is a misnomer and quite misleading. There are two main chemical used in the manufacture of polyfoam … one of these is a polyol and the other is an isocyanate. Both are petrochemical based and in the case of “ecofoam” or other so called “green” foams … some of the petrochemical polyols have been replaced with plant oil based substitutes that have been chemically altered and refined to work in the manufacturing of foam. The percentage replacement is usually less than 20% although in some instances it can be higher. Basically it’s polyfoam with a different and “greener” name.
GoldBond is a smaller manufacturer that makes some “better than average” quality and value mattresses but of course this would depend on the specific mattress and who was selling them. When you come across negative feedback … make sure you know the basis for the feedback and why the feedback was negative. In some cases … consumers will make a poor choice of mattress and then believe the mattress is low quality because it’s not comfortable when in fact they just chose the wrong mattress.
A mattress is only as good as the materials in it and the label doesn’t mean a lot except for those who are “brand shopping”. Any manufacturer can make mattresses that uses lower and higher quality materials. Brand shopping usually means a consumer is much more likely to be misled or misinformed or not make their decisions based on the quality of the materials in a mattress and usually leads to the purchase of a lower quality and value mattress in any price range. GoldBond makes some mattresses that use high quality materials such as latex which may be well worth including in your research.
Phoenix