This mattress is very good if you want something certified to be good for your health. I verified that the mattress does not have fiberglass anywhere within it. This is important as many memory foam mattresses have a fire retardant with fiberglass. Nonetheless I will say if you want firm, sadly this is not firm. It is more than just plush, it is SOFT. Which is sweet and comfy but not for someone who needs a firm bed. I regret buying only on that basis. Really wanted something firmer. Please have more options than just PLUSH!