Choosing a mattress is never easy, especially if you’re looking for a niche sleep solution. If you think the firmest, flattest sleep on the planet may be your thing, you can take our five-question quiz to be sure. All Brooklyn Bedding mattresses, including the Plank, do come with a 120-night trial, completely risk free. You can return or exchange your mattress any time within that period if you’re not 100 percent happy.