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Tuft & Needle

Kin by Tuft & Needle Firm 6" Adaptive Foam King Mattress in a Box

  • Based on 308 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Oct 28
Order within 4 hours and 31 minutes
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Style: Kin 6" Foam


Size: King


Features

  • Foam Design - Combining a breathable design and pressure-relieving foams, this foam king size mattress provides pressure relief and durable support, so you can rest well and wake up awake
  • Breathability and Bounce-Back support - Our open-celled T&N Adaptive foam maximizes breathability, support, and pressure relief. T&N Adaptive foam is designed to feel more supportive than a latex or memory foam mattress to help you sleep cooler
  • Responsibly Crafted - Each king bed mattress is fiberglass-free, GreenGuard Gold screened for over 10,000 harmful chemicals, and features CertiPUR-US certified foam; Please allow 48-72 hours to fully expand and for any potential odor to dissipate
  • Accessible Pricing - We're proud to provide you with remarkably comfortable mattresses at affordable price points; meaning you can sleep well on a firm foam mattress without comprising quality or comfort

Description

Discover the benefits of Tuft & Needle for less with the Tuft & Needle Kin 6 inch Firm Foam mattress. Exclusive to Amazon for the best savings, this mattress offers innovative cooling, responsive pressure relief, and a bounce- back feel, so you sink deep into sleep but never into your mattress. Rest well as our T&N Adaptive foam's bounce-back design keeps you lifted while contouring to your body to relieve pressure. Plus, sleep supported as a Foam Core helps provide durable support. With GreenGuard Gold and CertiPUR-US certified foams for better indoor air quality, this mattress helps you rest easy. Available in Twin, Twin XL, Full, Queen, King, and Cal King sizes, the Amazon-exclusive Tuft & Needle Kin 6" Foam mattress offers you the quality and comfort you need to wake up awake for years to come. This mattress is great for side sleepers, back sleepers, and anyone wanting better sleep on a firm bed. Stay cool at night with this compressed mattress in a box.

Brand: Tuft & Needle


Size: King


Product Dimensions: 79.5"L x 76"W x 6"Th


Item Weight: 51 pounds


Item Firmness Description: Firm


Top Style: Tight Top


Cover Material: Polyester or Polycotton


Number of Layers: 2


Fill Material: Polyurethane Foam


Special Feature: Lightweight


Item Firmness Description: Firm


Number of Layers: 2


Additional Features: Lightweight


Construction Type: Memory Foam


Size: King


Item Dimensions L x W x Thickness: 79.5"L x 76"W x 6"Th


Item Weight: 51 pounds


Item Thickness: 6 inches


Item Depth: 6 inches


Item Dimensions: 80 x 76 x 6 inches


Cover Material: Polyester or Polycotton


Fill Material: Polyurethane Foam


Product Care Instructions: Do not remove cover that came on the mattress, Spot clean soiled area with a mild detergent and water such as dawn soap


Mattress Comfort Layer Material: Memory foam


Material Type: Memory Foam


top-style: Tight Top


Color: Grey


Style Name: Kin 6" Foam


Item Highlight: CertiPUR-US certified, 10 Year Limited Warranty, 100-Night Trial, Made in the USA with global components, cooling performance


Brand Name: Tuft & Needle


Model Name: Kin 6" Mattress


Product Benefits: Provides supportive comfort and pressure relief for a restful night’s sleep


Model Number: 91


UPC: 811453038164 811453033817


Number of Items: 1


Mattress Type: Standard Mattress


Number of Packs: 1


Global Trade Identification Number: 64


Manufacturer: Tuft & Needle


Manufacturer Warranty Description: 10 year limited warranty.


Unit Count: 1 Count


Age Range Description: Adult


Included Components: Mattress


Item Type Name: Bed Mattress Conventional


Manufacturer Part Number: 91


Set Name: Kin


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Oct 28

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • So comfy, I sleep so well now!
Style: Kin 6" Foam Size: Queen
Perfect, so comfy, just the right mix of memory foam and not. I love this mattress! Got it for my truck camper and it's the right size and weight but doesn't sacrifice any comfort.
Reviewed in the United States on August 15, 2026 by Kindle Customer
    • Easy recommendation
Style: Kin 6" Foam Size: Queen
Five years on this as my everyday bed and it still feels the same as the day I unboxed it. No sagging, no dip where I sleep, no soft spot. That's the part I'd want to know as a buyer, because plenty of foam mattresses feel great for six months and then start caving. One heads up: firm means firm here. If you like sinking into a mattress this isn't it. It also doesn't trap heat the way I expected foam to. Easy recommendation at this price. ... show more
Reviewed in the United States on August 14, 2026 by Purfey
    • Great for kids!
Style: Kin 6" Foam Size: Twin
This was perfect for transitioning my son from his crib to a twin sized floor bed! It is okay for an adult to lay on but I wouldn’t recommend sleeping overnight on it, my husband and I have definitely woken up with some back pain after falling asleep in my sons bed!
Reviewed in the United States on July 25, 2026 by Hailey
    • Looooooovvvvvvveeeeeeeeee. If you are chemically sensitive, get it. Comfy. Moveable.
Style: Kin 6" Foam Size: Twin
I am a huge Tuft & Needle fan and this is my 3rd mattress with them (not because any of the others failed--I had to move, etc.) and I've purchased a number of toppers from them as well. I'm super allergic to memory foam---can't use it at all. Normal foam I can use after a couple month outgassing. Tuft & Needle, I can use in a matter of days--right away if I'm not being a baby. Now for this specific mattress. I've had a twin before but the deeper twin. I love this thinner one because its so easy to move around--not everyone needs that, but for me, its perfect. Just as comfortable if not more so than the thicker one. I personally put a topper on the top of their mattresses, but I doubt most people would need this---I realize this is highly subjective and personal. To me, two Tuft & Needle toppers on top of a rug is perfection in terms of comfort, but when you don't want to live like a college student, their mattresses are great. Really in the Goldy locks zone of squish versus firm. They don't get all sunken and weird. Just a wonderful product AND a good brand--if you don't like their stuff, they have you donated it to a charity and give you the refund. I was not paid for this review, FYI, just gaga for Tuft n' Needle. Also--pro-tip--if you are ever in a jenky hotel and need to outgas an egg crate topper quickly, you can put them in a public dryer with one of those anti-allergy fabric softener sheets---speeds everything up. ... show more
Reviewed in the United States on July 15, 2024 by Chicago Greeneggs
    • Love this mattress!
Style: Kin 6" Foam Size: Twin XL
We purchased a twin XL for our spare bedroom so I really couldn't give it an accurate review until now. Long story short, I had to sleep on this mattress for the last few months and I have to say I like it better than any of the full size mattresses we've owned in our master bedroom. We did have to purchase a mattress topper because it was too firm as is. We bought a 2" topper and it's very comfortable now after getting used to it as it is still a bit firmer than what I've been use to. Knowing how much I love this mattress, I'm wishing I would have purchased a full size for our master bedroom instead of the $1,200 mattress that we did. ... show more
Reviewed in the United States on July 16, 2024 by A.Q.
    • Great Value Quality Mattress for Daybed Trundle
Style: Kin 6" Foam Size: Twin
Nice firm twin mattress that fit perfectly into the trundle. Great price and looks super quality.
Reviewed in the United States on August 5, 2026 by Lisa V Munoz
    • Best Affordable Mattress Around
Style: Kin 6" Foam Size: Twin
Great, comfortable mattress. Perfect balance of softness and support. Love the long warranty. We needed another twin mattress for our youngest child's "big boy bed," and after looking at dozens of mattresses we narrowed it down to "the best of the cheap" (a different one) and "the cheapest of the best" (this one). We picked this one, and it was the right choice. Love Tuft & Needle. I bet you will too. ... show more
Reviewed in the United States on March 13, 2026 by KWong
    • Horrible smell that takes a long time to go away
Style: Kin 6" Foam Size: Twin XL
We have this model in twin and a twin xl sizes. The twin size one is fine, but the twin xl has an incredibly strong chemical smell. Airing the room daily and using an air purifier helps a bit, but it was weeks of this. Close the windows for a few hours and you get back to nauseating level of fumes. Comfort is appropriate for my young kids, although adults would probably want more support. ... show more
Reviewed in the United States on May 1, 2022 by Frank White

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