We’re reader supported. If you make a purchase using the links included, we may earn commission at no extra cost to you!

comparison

BedInABox Tranquillium vs Sealy Cocoon Chill

Easily compare the Sealy Cocoon Chill vs BedInABox Tranquillium Mattresses side-by-side.

Latest Promotions
Limited Time Up to 25% off* Mattresses, bundles & more. Plus, free pillows with select orders. *Excludes the Essential mattress. Now through 5/6
See offer
April Savings Event ! Save 35% on all Mattresses + Free Sealy® Sleep Bundle
See offer

Essential Mattress Info

Brand
BedInABoxSealy
Mattress Type
Memory foamMemory foam
Prices
Video

Trial & Warranty

Trial Period
Icon check markIcon check mark
Trial Period (nights)
120100
Warranty Length (years)
2010

Firmness Options

One Firmness Fits All?
Icon check markIcon check mark
Adjustable Firmness
Icon timesIcon times
Half-Half Firmness
Icon timesIcon times
Selectable Firmness
Icon timesIcon times
Flippable / Reversible Firmness
Icon timesIcon times
Firmness Info

A firmer and supportive feel.

The Cocoon Chill is a medium firmness, about a 6 on the firmness scale. We've found that most sleepers prefer a mattress that's fully supportive but not too firm, so we created a mattress with our Perfect Fit memory foam that adapts to your unique body size, shape and sleep position.

Mattress Construction

Materials Overview

A 3-layer construction:

  • 3" 3lb Density CoolRest® Memory Foam Infused with Liquid Gel
  • 2" Pluralux Foam
  • 7" 2lb Density Sure Align Support Foam
  • Smooth Knit Cover.

3 layer construction:

  • Perfect Fit Memory Foam
  • Personalized Comfort Layer
  • Support Foam.

Comfort Info

3 lb density memory foam rebounds (takes it shape) quicker making it easier to change positions.
The TENCEL® cover is a performance fabric like no other, absorbing moisture completely and naturally, creating a cooler and more comfortable sleep. With more breathability than cotton, and a softer hand than silk, TENCEL® can be found anywhere from athletic wear to luxurious bedding. Nothing is dreamier than going to sleep on a bed made with TENCEL® fibers.

A top layer of memory foam helps reduce the amount of movement from your sleep partner. The Soft model reduces a bit more motion transfer than the Firm model.

Support Info

Our CoolRest™ gel advanced memory foam quickly conforms to your body for pressure relief and support without letting you sink too far into the mattress.

Our high-quality memory foam adapts to your body size, shape and sleep position to ensure a great sleep no matter which feel is right for you.

Comfort Specs

Open cell memory foam increases air flow, contributing to a cooler sleep.
Sure Align foam works in tandem with CoolRest® Gel memory foam and provides perfect support for long lasting comfort.

Phase Change Material (PCM) absorbs your body heat leaving you with a cool to the touch mattress experience.

Support Specs

CoolRest® Gel memory foam perfectly contours to your body providing improved pressure relief to reduce tossing & turning.
Sure Align foam designed to support & correctly align your spine so you can sleep better.

Support Foam base layer engineered to be highly durable and resilient. We've tested it, and we know it bounces back every time.

Fabric Specs

The TENCEL® cover offers unique moisture management properties - absorbs 50% more moisture than cotton, making it a highly effective performance fabric. Rapid absorption of moisture proves most effective in inhibiting bacterial growth naturally, without adding any chemicals.

Our premium stretch-knit cover is infused with a proprietary "Phase Change Material" that absorbs and dissipates heat for a refreshing, cool to the touch surface.

Manufactured in
United StatesUnited States

Suitability

Side Sleepers
Icon check markIcon check mark
Back Sleepers
Icon check markIcon check mark

Size & Weight

Twin
Icon check markIcon check mark
Twin Dimensions
75 x 38 x 12 "74.5 x 38 x 10 "
Twin Weight (lb)
5340
Twin XL
Icon check markIcon check mark
Twin XL Dimensions
80 x 38 x 12 "79.5 x 38 x 10 "
Twin XL Weight (lb)
6242
Full
Icon check markIcon check mark
Full Dimensions
75 x 54 x 12 "74.5 x 53 x 10 "
Full Weight (lb)
7656
Queen
Icon check markIcon check mark
Queen Dimensions
80 x 60 x 12 "79.5 x 60 x 10 "
Queen Weight (lb)
9064
King
Icon check markIcon check mark
King Dimensions
80 x 76 x 12 "79.5 x 76 x 10 "
King Weight (lb)
11383
Cal King
Icon check markIcon check mark
Cal King Dimensions
84 x 72 x 12 "83.5 x 72 x 10 "
Cal King Weight (lb)
11383

Certifications & Sustainability

Certifications
CertiPur-US®
CertiPur-US®
CertiPur-US®
Other Certification Info

Delivery

Delivery Cost
FREEFREE
Delivery Info

Typically, orders are shipped within two business days of receipt from our warehouse in Johnson City, TN via FedEx Ground. Delivery is usually 1-5 days depending on where you live.

When you order your Cocoon™ by Sealy mattress, we’ll ship it to you (by UPS Ground) for free. Typically, your Cocoon™ by Sealy will arrive in 5 to 7 days.

Prices
Latest Promotions
Limited Time Up to 25% off* Mattresses, bundles & more. Plus, free pillows with select orders. *Excludes the Essential mattress. Now through 5/6
See offer
April Savings Event ! Save 35% on all Mattresses + Free Sealy® Sleep Bundle
See offer