The Best Mattresses You Can Buy Online, As Tested by Strategist Editors We slept on each of these for at least a week.

We wrote last year about a golden age of mattresses. So many start-ups had popped up to challenge the likes of Sleepy’s and Tempur-Pedic — Casper and Tuft & Needle and Leesa and Saatva among many others — that we tested a bunch to make sense of it all. Since then, the mattress-sphere has only gotten more crowded, with more brands continuing to debut, and existing brands rolling out new models and phasing out older ones. Meanwhile, the question, “What mattress should I buy?” has gotten trickier to answer.

So we’re doing this again. We’ve updated symbol mattress our guide by trying these beds out ourselves. Determining which mattress to buy will always depend on you — your sleeping position, temperature, firmness preference, and your budget — and the perfect mattress only becomes obvious once you’ve actually slept on it. The writers and editors on our team described their individual sleeping profiles, and as best we could, we each tested a mattress that we might have bought for ourselves, if we were shopping based on other online reviews. After a week (not after one night, and not after half an hour in a store), we wrote our reviews. So if you’re a stomach-sleeper who runs hot at night, look for the Strategist editor who is, too. Same goes for if you’re a side-sleeper, or you hate foam, or your back hurts all the time.

A couple of things to note: All the mattresses here are some of the best-reviewed on the market, so there are no duds. Rather than name the “best mattress for everyone” (which we’re convinced doesn’t exist), we set out to judge each on its own terms. The starting prices we’ve listed are for queen-size mattresses. And for companies that offer more than one mattress design, we picked only one option. Still, we hope the review serves as a baseline for how firm, springy, or cushy the brand’s other products might be. We’ll be adding more mattresses from other companies as we go, but for now, here’s our answer to that question about which mattress you should buy.

Saatva Classic

How I sleep: I slouch, so at night I need to lie down on something very firm to counter a long day of slightly stooped sitting and sinking into my hips while standing. I start out on my back, but eventually collapse over to my side by the middle of the night.

What to know: Saatva, which has been around for eight years, was one of the first online, innerspring mattress companies. They offer three versions: soft, luxury firm, and firm. In each, an organic cotton pillow top — some people call it “Euro-style,” or “hotel-style” — covers a top layer of eco-friendly memory foam, which sits on a level of individually wrapped coils above another layer of recycled steel coils, then a poly foam base.

How I slept: Because of my generally sore back, I was tasked with testing some of the firm mattresses out there. Side-sleepers, the company told me, are said to prefer the Luxury Firm. So I got it, and my first impression was how sturdy the bed felt. But lying down, I immediately noticed how incredibly bouncy the double layer of coils makes the Luxury Firm. I can certainly see why side-sleepers would like the pressure-relief it offers, but I decided to swap it for the Firm, hoping it would focus support on my lumbar region. Which it very much did. You feel more on top of it, because of the steel springs, but you still have the contoured shape of the raised pillow top. I move around at night, shape-shifting from my back to my side to stomach, but the firmness of this mattress never created a sunken, stuck feeling, which I’ve found happening with memory foam. Instead, the supported feeling of this bed (which still manages to be pretty plush) kept my lower back from collapsing in, making my spine feel more aligned overall.

The fine print: Saatva allows customers a 120-day trial run, as well as a full return or exchange. The mattress is covered by a 15-year warranty. All sizes are available in two heights — a “Custom Slim” 11.5” and a “Premier Luxury” 14.5” — and give the same level of support. The company offers free white-glove delivery and mattress removal.