The Quatro Sleep brand includes mattresses, adjustable beds, and pillow cases. The mattresses and adjustable beds are listed on Amazon, and the pillow cases on other sites, such as Anna Linens.
Rayon is a fine fiber with a good feel and good appearance. It is strong, and it is more absorbent than cotton or linen. Also, silica rayon is one of the alternatives to using chemicals for fire resistance in mattresses.
Most people associate the Gold Bond Mattress Company with futons and futon mattresses. That is only natural. For one thing, Gold Bond, along with Bedworks, is credited with developing and popularizing the modern Western futon and futon mattress from the original Japanese foldable sleeping mat (Gold Bond, in 1980, actually beat Bedworks (1982) by two years).
Rush Mattress, based in High Point, North Carolina, is a specialty mattress manufacturer. Not to be confused with specialty sleep (mattresses without metal coils), specialty mattresses are tailor-made or customized to the specifications of retailers and distributors.
Cotton, one of the oldest textile fibers, continues to be one of the most used, even with the wide use of synthetic fibers as well as other natural fibers, and it still is an important material in many mattresses.
Overall, judging by customer reviews and independent reviewers, if you want an all-latex mattress, the Spindle Mattress is a good one for the price. Spindle does let you know if, by your measurements, sleeping position, and preferences, the Spindle Mattress might not be your best option.