The Volas Mattress Topper listing presents one practical change: you keep the mattress and add a quilted layer on top.
That is different from buying a new mattress. Colour and size change the look and the fit. They do not turn the topper into a mattress.
The written listing mentions sleep comfort without replacing the mattress. It also includes health-style marketing lines. Those lines are not used here as proven results.
Photos show a quilted surface. Thickness, fill and fabric content are not specified in the written listing.
If you want an add-on layer in a listed size, open the Volas Mattress Topper details.