Hi Tiredshopper55,
ADMIN NOTE: Removed 404 page link | Archived Footprint 1: Amazon.com Archived Footprint 1: Amazon.com
Ultimate Sleep is the same company as Absolute Comfort On Sale which sells the same 4" 100% natural Dunlop Ergosoft topper as Ultimate Sleep is selling on Amazon. Ultimate Sleep site rates their 5.3 lb density medium firm Ergosoft topper as being in a 28 - 30 ILD range while Absolute comfort rates theirs as being in a 24 - 27 ILD range so at least one of them isn’t correct If the density of both toppers is the same. If you look at the density compared to the ILD range for Latex Green 100% natural Dunlop here then a 5.3 lb topper would also be firmer than either of them have listed.
Ultimate Sleep is also selling what appears to be the same topper with a different product name in the other link you listed but that has the same density (5.3 lbs) but they list this one as being 24 - 27 ILD which is the same as the Absolute Comfort Ergosoft ILD range.
Rocky Mountain’s 4 inch 100% natural Dunlop topper is from a different company and is 5.2 lb density and they list theirs as being 25 ILD which is probably a little low as well.
Sleep Warehouse sells the same 5.2 lb density topper here and their ILD’s are the same as Rocky Mountain which means that they are probably also a little low.
As you probably know from your reading here I don’t make specific recommendations because there are too many unknowns, variables, and personal preferences involved to make specific topper recommendations for someone else and your own sleeping experience will be the only way to know whether any mattress/topper combination will be a good “match” for you in terms of PPP but I would make sure that you find out the specifics of the exchange/return policies and options with each of them and any costs involved and include that as part of the “value” of your purchase just in case the topper you purchase doesn’t turn out as well as you hoped for.
I would also keep in mind that you could also try a 3" topper which would open up more topper options for you and then add another inch if you find you need to.
I would also add a topper cover for your topper to help protect the latex from damage from handling (latex can tear easily) and from oxidation or from breaking down prematurely from exposure to air and other substances that can harm it over the longer term (see post #12 here and the posts it links to).
Phoenix