Hi cabruce3,
Yes … this is the mattress that uses what they call “fall off” which is strips of latex that are glued together.
These are all latex/polyfoam hybrid mattresses which use a layer of latex on top of a polyfoam support core although they each have different designs.
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These are “all latex” mattresses.
There is more about some of the general differences between a latex/polyfoam hybrid and an all latex mattress in post #2 here.
When you can’t test a mattress in person then the most reliable source of guidance is always a more detailed conversation with a knowledgeable and experienced retailer or manufacturer that has your best interests at heart and who can help “talk you through” the specifics of their mattresses and the properties and “feel” of the materials they are using (fast or slow response, resilience, firmness etc) and the options they have available that may be the best “match” for your child based on the information you provide them, other mattresses you are considering that they are familiar with, and the “averages” of other children that are similar to yours. They will know more about “matching” their specific mattress designs and firmness levels to different body types, sleeping positions, and preferences (or to other mattresses that they are familiar with) than anyone else.
All of the mattresses you listed use good quality and durable materials and there are no lower quality materials or weak links in any of them that would be a cause for concern in terms of durability so in a suitable firmness level any of them would be a good quality/value choice.
Subject to confirming that any retailer or manufacturer on the list you wish to deal with is completely transparent (see this article) and to making sure that any mattress you are considering meets the quality/value guidelines here … the better options or possibilities I’m aware of in and around the St George, UT area are listed in post #3 here.
The Las Vegas/Henderson list is in post #2 here.
Once you have narrowed down your options to a list of finalists that are all choices between “good and good” (which you have) and none of them have any lower quality materials or “weak links” in their design (which they don’t) and if at this point there are no clear winners between them (which is usually a good indication that you have done some good research) then you are in the fortunate position that any of them would likely be a suitable choice and post #2 here can help you make a final choice based on your more detailed phone conversations about each of them, the firmness and suitability of each one, their prices, your preferences for different types of materials and components, designs, or types and blends of latex, the options you have after a purchase to fine tune the mattress or exchange or return the mattress or individual layers and any costs involved, any additional extras that are part of each purchase, and on “informed best judgement” based on all the other objective, subjective, and intangible parts of your personal value equation that are most important to you.
Phoenix