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Cocoon by Sealy Chill Mattress

starting at $769.00

Best For:

  • Hot Sleeper
  • Fibromyalgia
  • Pregnancy
  • Older Adults

Available Sizes:

  • Twin - ($769.00)
  • TwinXL - ($869.00)
  • Full - ($969.00)
  • Queen - ($1239.00)
  • King - ($1539.00)
  • CalKing - ($1539.00)

Cocoon is Sealy’s bed-in-a-box line which includes the Chill Memory Foam mattress. The 10-inch mattress is designed for personalized, conforming comfort — and at a great price. A medium-firm feel accommodates a range of sleeping styles.

35% Off + Free Pillows & Sheets Code: SY35Shop on Sealy Cocoon
Free Shipping

Who is this best for?

Hot Sleeper

What hot sleepers need in a mattress:

  • Breathable, moisture-wicking fabrics or perforated materials such as gel foams to control body temperature.

  • Springs or air chambers to promote airflow.


What people who have fibromyalgia need in a mattress:

  • Zoned support that offers pressure point relief at your back, hips, neck, and shoulders.

  • Hypoallergenic and cooling materials if your symptoms include excessive sweating and allergies.


What pregnant people need in a mattress:

  • A medium firmness, designed to support the low back with enough give to contour your body and cradle your shoulders.

  • Cooling features and breathable materials that may help counteract body temperature changes.

Why We Like It

  • CertiPUR-US certified and designed and built in the United States

  • great price point with free extras, like pillows and sheets

  • cooling features combat hot, sweaty nights

Who It May Not Be For

  • people looking for a luxury mattress

  • those who want mattress delivery and setup

  • shoppers who don’t like the bed-in-a-box model

Product Information

The 10-inch Chill memory foam mattress from Cocoon by Sealy is a wallet-friendly mattress designed with advanced cooling technology. Memory foam layers are adaptive and responsive, contouring to your shape and sleeping position with a soft, supportive firmness.

A responsive comfort foam layer offers cushioning support, reduces motion transfer (great for couples!), and avoids the dreaded “sinking in” sensation. The mattress is rounded out with essential support layers that are engineered from heavier foam for durability and resilience.

But the real tech is in the cover. A proprietary phase change material (material that adapts with your body temperature during the night) is pleasingly cool to the touch, but that’s just the beginning. The material absorbs body heat to help you fall asleep comfortably. Then, it releases that heat back to you while you sleep, regulating your temperature, so you don’t wake up feeling too hot or too cold. That means more peaceful, more restorative sleep — and who doesn’t like that?

The Chill mattress is designed with a medium-firm feel for adequate support that isn’t too hard.

You can test drive the Chill memory foam mattress from Cocoon by Sealy in the comfort of your own room with a 100-night trial. The mattress ships free, with free returns if it doesn’t work out. Plus, it’s covered by a 10-year limited warranty.

Hot Sleeper, Fibromyalgia, Pregnancy, Older Adults
Sleep Positions:
Side Sleepers
Cooling Material
Cooling Technology:
Comfort Level:
Body Type:
Under 230 lb
Very Good
Edge Support:
Firmness Rating:
Available Size:
Twin, Twin Long, Full, Queen, King, California King
38" x 74.5" (Twin) to 72" x 83.5" (California King)
Motion Isolation:
Trial Period:
100 Nights
10 Years
Coupon code:
35% Off + Free Pillows & Sheets Code: SY35