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Cocoon by Sealy Chill review

A 10-inch memory foam mattress from Sealy with a medium, conforming feel and a phase change material cover.

By the HearSmart research desk · Updated November 10, 2026

Performance (40%)
8.3
Ease of use (25%)
8.5
Value (35%)
8.0

Cocoon by Sealy Chill is Sealy's direct-to-consumer memory foam bed, and its selling point is temperature. Sealy describes a 10-inch mattress with a medium, conforming feel, built around its Perfect Fit memory foam, under a cool-to-the-touch cover infused with a phase change material that absorbs and spreads heat. Sealy says the foam absorbs movement to limit motion transfer, which helps couples. When we checked, a queen cost $919 and came with a free Sealy Sleep Bundle of two pillows, a sheet set and a protector valued at $179. Shoppers who want more bounce can choose the 12-inch Chill Hybrid, which adds over 900 individually wrapped coils and stronger edges. The terms are a 100-night trial, free delivery and a 10-year warranty. It ranks below Leesa and Siena on value: Nectar's 12-inch bed costs $220 less with a longer trial, and Sealy publishes fewer layer details than the budget brands.

Who it is for

Hot sleepers who want a big-brand memory foam bed with a cooling cover and a free bedding bundle.

Price

Queen $919 with a free sleep bundle when checked.

Protector ($179.00 Value) $919.00
Quoted from the vendor pricing page on November 10, 2026.

Key features

  • Perfect Fit memory foam that adapts to body shape
  • Cool-to-the-touch cover infused with phase change material
  • 10-inch profile with a medium feel
  • Hybrid version with over 900 wrapped coils
  • 100-night trial and 10-year warranty

Strengths and weaknesses

  • Strength: Cooling cover is the most specific heat feature among the foam beds here
  • Strength: Free pillows, sheet set and protector were included when checked
  • Strength: Backed by Sealy, a long-running mattress maker
  • Weakness: $919 for a queen, more than Nectar's taller bed
  • Weakness: 100-night trial
  • Weakness: Sealy gives fewer layer thickness details than Lucid or Leesa

Key facts

  • Queen price: $919 when checked
  • Height: 10 in
  • Feel: Medium
  • Trial: 100 nights
  • Warranty: 10 years

Where it ranks

Cocoon by Sealy Chill is No. 7 in our Best Memory Foam Mattresses verdict and No. 7 in Best Sealy Mattresses.

Alternatives we scored

Visit sealy.com · Questions or corrections: editorial@hearsmart.org