TEN-18-35
The TEN-18-35 is a perennial classic. A layer of medium-soft hybrid foam sits atop a firmer version of the same material, making this construction perfect for shifting sleepers. One of the highest-density, most durable foam cores available on the market rests in the core to create a sturdy, all-around performer.
Mattress purchase includes free delivery and our 30/90 Commitment.
Sleep hot? Learn how KülKōte keeps you cool.
Meet the TEN-18-35.
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A unique foam that provides great pressure-relieving benefits without the use of memory foam, this top layer gives softness, without the feeling of sinking in. It also adds support that’s uncommon in a soft top layer.
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Designed to deliver better support and more bounce than memory foam, but far better pressure relief than latex or springs, this Responsive Foam is truly the best of both worlds. With an 18 IFD firmness rating, it’s a perfect mid-layer for those who prefer a medium-firmness mattress.
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With a foam that’s 75% more dense than a typical foam mattress core, our 2.8 density foam core is built to last. The 35 IFD (which is the measurement of firmness) provides a medium-soft feel. It also utilizes a unique I-Beam CNC profile to add pressure relief and additional airflow, ensuring long-lasting, cooling comfort.
Twin = 39"x75"
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Twin XL = 39"x80"
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Full = 53"x75"
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Queen = 60"x80"
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King = 76"x80"
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Cal King = 72"x84"
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Twin = 39"x75" | Twin XL = 39"x80" | Full = 53"x75" | Queen = 60"x80" | King = 76"x80" | Cal King = 72"x84" |
Beyond Basic Warranties
The 30/90 Comfort Commitment
We won’t rest well until you do. Instead of just refunding your money if you’re unhappy, we’ll use 120 days to rebuild a custom mattress that works for you. And if we can’t, then we’ll refund you.
The 30/90 Comfort Commitment
We won’t rest well until you do. Instead of just refunding your money if you’re unhappy, we’ll use 120 days to rebuild a custom mattress that works for you. And if we can’t, then we’ll refund you.
Density Means Durability.
Ever seen a foam mattress with a big, body-shaped indent in it? That’s almost all because of the use of low density foams. But it’s not just the top layers of the mattress that need high density foam.
Oftentimes, mattress manufacturers will use quality, high-density foam in the top layer or two of a mattress (the parts you feel), then opt to use low-density, cheap foam in the base layer of the bed in order to cut costs. As a result, a cheap, low-density base is almost always to blame for body impressions, not the top layers. The foam simply isn’t made to last and will collapse with very little use.
1.5-1.8 lbs/ft³
(Most Foam Mattress Cores)
Nearly all bed-in-box mattresses found online use foam with a core density in this range, and most of those are closer to the low end of the range. They may feel the same as higher density foams because density does not equal firmness. They won’t always feel the same, though.
Over time, these foams will lose 35% of their firmness and 5% of their height.
In other words, they create body impressions and get softer faster than higher density foams. But they’re far less expensive, which makes them very attractive to other mattress retailers, who hardly ever even tell you the density of the foam they use.
2.8 lbs/ft³
(Comfort Option Foam Core)
Comfort Option uses foam with a 2.8 density, a level quality that is unmatched by our competition. This foam is nearly twice as dense, and in our internal tests, performs nearly 5x better than 1.5 density foams in terms of height loss.
Over time, our foam only loses less than 20% of its firmness and less than 3% of its height.
We’re transparent with the foam we use and call our products “Honestly Crafted” for that reason. We use the most quality foams in the industry and therefore are excited to offer as much information about our specifications as we can.
What is KülKōte?
An advanced phase change material that regulates your temperature as you sleep. Available on all Comfort Option® mattresses.
KülKōte is a Phase Change Material.
KülKōte is a water-based, polymer coating that uses micro-capsules that continually changes phases from liquid to solid in order to effectively manage heat energy. We spray it right onto the surface of the foam on the top layer of our mattresses, along with the surface of our SoftFlo® pillows.
“After searching endless places for the “perfect” mattress and being overwhelmed, I found Comfort Option from an online source. I did the quiz to pair a mattress to me and my husband’s sleeping patterns, height, weight, etc. and bought the customized mattress for us. I was expecting a little bit of a wait but the mattress came to us in California in under a week! I also had a couple of specific questions about the mattress that the customer service team was happy to answer for me (shout out to Meredith!). Now that we have our Comfort Option mattress, we couldn’t be happier. I was waking up with back pain on our old mattress and now both me and my husband sleep soundly on it. I’m recommending this place to all I know. Just good quality mattresses, good service, with no gimmicks.”
