American standard mattresses, as they are often made with wool and cotton padding. For mattress types, there are many different types of mattresses, and one of the is standard mattress.
American mattresses come in a variety of shapes, sizes, and materials, such as innerspring and gel-infused memory foam. Mattresses come in different shapes, sizes, and levels of firmness. For mattresses, they come in different shapes, sizes, and levels of foamness.