Materials Matter: Navigating the Weird World of Mattress Materials

It’s that time of year when the smart people with good taste focus on stuffing. All that delicious stuffing, perfectly constructed with all the most delicious ingredients, just begging you to dive in, and take a big nap. Yes, mattress stuffing. What other kind were you thinking of?

So, let’s cut to the chase: we know you don’t want to become a mattress expert — you just want to find a super-fabulous mattress: one that’s packed full of naturally luxurious materials that don’t just feel good for the first few months, but actually feel really good, and deliver healthy sleep for years to come.

Online mattress companies do all sorts of fancy things to mattresses to make them as good or attractive as possible — from adjusting foam density at pressure points to created zoned support to lacing the top layer with candy to give you sweet dreams (just kidding).

But all the manufacturing tricks in the world can’t fix low-quality mattress materials. To make a mattress, you have a pretty narrow set of materials to choose from — yet when companies choose materials, there’s actually a really wide range in terms of quality. Here are some of the key materials that go into a mattress… and what to look for when you’re looking for the highest quality luxury mattress.


High-density foams are made from everything from plant- or petroleum-based latex to polyurethane memory foams. Those foams have wide density ranges, which are usually rated from 1.0-5.5 lbs per foot of foam. The top-notch foams in the industry are foams that meet the highest quality bars in two forms: first, in high-density. Sleep365 uses Serene foam — among the highest density foams around — it’s foam that feels like you’re sinking into a cloud while kinda being lifted up at the same time. It doesn’t firm up when it’s cold, and sleeps cooler than other memory foams.

The other quality bar is not just density — it’s what goes into them and how they’re made. You want your luxury to come naturally — so while lots of companies source toxic or unsustainable foams and treat them with chemicals, Sleep365 sources and produces foams that are made with natural materials and are CertiPur US® certified… so you get the best quality with sustainable, green manufacturing, made in the U.S.


It’s not just about adding something soft. There are lots of ways to add extra cushion — ranging from cheap cloth fibers to gels and wool. Some companies call the padding they weave into the top quilt a pillow-top mattress… but, just like pillows, not all padding is created equal.

Sleep365 pads our mattresses with super-soft, sustainable, and carefully harvested Joma wool from New Zealand sheep. Joma wool goes through a cool crimping process that increases the wool bulk by up to 50%, which provides greater loft, resilience, and durability. Our Joma wool mattress padding is hand-tufted and woven into the top fabric cover to maximize padding and make sure it holds its own for years to come. Plus, Joma wool provides moisture-wicking for all those sweaty nights (hey, it’s natural), and temperature regulation.< p/>


Coils come in all sorts of shapes, forms, and sizes. From s-shaped coils that link to together to hourglass-shaped coils that are basically springs to the super-fancy wrapped coils that use high-grade metal and are individually wrapped to provide the ultimate support, longevity, and make your night’s sleep undisturbed even when your partner is sitting up, turning over, or climbing into bed after you’re already asleep. Sleep365 uses the fancy ones — Quantum Edge and CombiZone coils that are individually wrapped with fabric and assembled separately but designed to work in harmony with all the others. They cost a bit more to make, and take a bit more design and engineering to get right, but they make your sleep a whole lot better.

Sleep365 is a big believer in hybrid beds, too — where we’re taking the best of coils and foam to create a supportive, responsive, and elegant bed that just begs you to hit snooze.

Cover fabrics.

The fabrics that make a cover can range from our favorite eco-friendly modal fabrics to whatever industrial strength twill an online mattress company can get a good price on. Since we construct the insides of our mattresses to hold up and perform beautifully for over 11 years, we need to make sure the cover stands up to all those years of dreaming, too. Our fabric covers come from natural sources like birch trees and cotton, they’re conditioned to last, and and they’re treated with the ultimate care at every step of the process.


Our elegantly designed stitch patterns are nice to look at, but we do it for both style and substance — we’re having cake and eating it, too. The cross-stitching forms a cellular structure that makes each part of the mattress strong on its own and ready for whatever you can throw at it (rubber sheets not included). But you can’t do it without the strongest industrial threads available — and that’s what we put to work to make our mattresses. Plus, we cross-stitch and triple-stitch seams to ensure all that pillowy goodness we put inside your mattress can stay intact for decades.

There’s more. But we’ll stop.

When you’re ready to buy a mattress, make sure you don’t get charmed by mediocre components hiding behind fancy trademarked terms. Be sure to get the real scoop on those luscious foams and swirly coils. And, if the company’s doing it right, you’ll see how much their materials really matter.

Get a mattress made from the best materials. Shop now.

(And happy Thanksgiving.)