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Cocoon by Sealy Chill

Memory foam with phase change cooling

★ 4.2 / 5.0 Editors' score

Cocoon by Sealy Chill (Cocoon by Sealy Chill) is a Soft (4/10) or Firm (7/10) cooling mattress priced at $919 (on sale for $597). It rates 4.2/5 overall — 4.3 comfort, 4.1 support, 4.6 cooling, and 4.5 value. Built from Memory foam with phase change, 10 inches (12 with Chill upgrade) tall, with a 10 years warranty and a 100 nights sleep trial. Best for hot sleepers on budget, side sleepers (soft) or back sleepers (firm), those wanting memory foam with cooling.

Key Facts

Brand Cocoon by Sealy
Model Chill
Type Cooling
Price $919 (on sale for $597)
Firmness Soft (4/10) or Firm (7/10)
Material Memory foam with phase change
Height 10 inches (12 with Chill upgrade)
Warranty 10 years
Sleep trial 100 nights
Overall rating 4.2 / 5.0
Last updated 2026-02-24

Rating Breakdown

4.3
Comfort
4.1
Support
4.6
Cooling
4.5
Value

Overview

The Cocoon by Sealy Chill is a mattress designed to regulate sleep temperature using phase change material integrated directly into its cover. This material works by absorbing excess body heat when you get warm, helping to dissipate it and maintain a more consistent, cooler surface throughout the night. It is an effective solution for sleepers who often overheat. This mattress is constructed with a durable foam core and is available in two comfort levels: soft (for side sleepers or those who prefer a plush feel) and firm (for back, stomach, or combination sleepers needing more support). A key feature is its CertiPUR-US certified foam, which is made without harmful chemicals. The mattress also comes with a removable, machine-washable cover for easy cleaning and is compressed and shipped in a box for straightforward setup. The Cocoon Chill is ideal for hot sleepers, couples with different firmness preferences, and anyone seeking a practical cooling solution without complex technology or high costs. Its primary benefit is delivering a noticeably cooler sleep surface that actively manages heat buildup. A clear use case is a couple where one partner sleeps hot and prefers a soft feel, while the other needs firmer support. They can order two separate Cocoon Chill mattresses in their preferred firmness, each receiving the same cooling benefit, and potentially use them on an adjustable base or in a split king configuration.

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Key Features

  • ✓Phase change material
  • ✓Premium memory foam
  • ✓Stretch-knit cover
  • ✓Two firmness options

Pros

  • ✅ Effective cooling
  • ✅ Good value
  • ✅ Two firmness options
  • ✅ Made by Sealy

Cons

  • ❌ May still sleep warm for some
  • ❌ Edge support limited
  • ❌ All-foam construction

Best For

  • →Hot sleepers on budget
  • →Side sleepers (soft) or back sleepers (firm)
  • →Those wanting memory foam with cooling
  • →Couples

Compare Cocoon by Sealy Chill

coolingmemory foamphase changevaluehot sleeper

Frequently Asked Questions

What is the Cocoon by Sealy Chill?
The Cocoon by Sealy Chill is a mattress designed to regulate sleep temperature using phase change material integrated directly into its cover. This material works by absorbing excess body heat when you get warm, helping to dissipate it and maintain a more consistent, cooler surface throughout the night. It is an effective solution for sleepers who often overheat. This mattress is constructed with a durable foam core and is available in two comfort levels: soft (for side sleepers or those who prefer a plush feel) and firm (for back, stomach, or combination sleepers needing more support). A key feature is its CertiPUR-US certified foam, which is made without harmful chemicals. The mattress also comes with a removable, machine-washable cover for easy cleaning and is compressed and shipped in a box for straightforward setup. The Cocoon Chill is ideal for hot sleepers, couples with different firmness preferences, and anyone seeking a practical cooling solution without complex technology or high costs. Its primary benefit is delivering a noticeably cooler sleep surface that actively manages heat buildup. A clear use case is a couple where one partner sleeps hot and prefers a soft feel, while the other needs firmer support. They can order two separate Cocoon Chill mattresses in their preferred firmness, each receiving the same cooling benefit, and potentially use them on an adjustable base or in a split king configuration.
How much does the Cocoon by Sealy Chill cost?
The Cocoon by Sealy Chill is listed at $919 and frequently on sale for $597.
How firm is the Cocoon by Sealy Chill?
The Cocoon by Sealy Chill is Soft (4/10) or Firm (7/10), built from Memory foam with phase change.
Who is the Cocoon by Sealy Chill best for?
It is best for hot sleepers on budget, side sleepers (soft) or back sleepers (firm), those wanting memory foam with cooling, couples.
What are the downsides of the Cocoon by Sealy Chill?
Reported trade-offs include: May still sleep warm for some; Edge support limited; All-foam construction.
What are the best Cocoon by Sealy Chill alternatives?
See our full list of Cocoon by Sealy Chill alternatives, with side-by-side specs, ratings, and pricing, on the Cocoon by Sealy Chill alternatives page.

Last updated: 2026-02-24