365-Night Trial

365-Night Trial

Take a full year to decide if our mattress is right for you.
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10-Year Warranty

10-Year Warranty

Experience 10-year support for your mattress.
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Free Shipping

Free Shipping

Enjoy complimentary free shipping across the U.S.
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Arrives in 2-5 Days

Arrives in 2-5 Days

USA assembly ensures all products are delivered in 2 to 5 days.
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Sky Cool Medium Firm Mattress Topper

Upgrade your bedding with the Sky cool mattress topper, crafted with advanced phase-change materials and breathable fabric layers, to create a cooler, more restorative sleep environment that you can trust for comfort every night.
🔹Ergonomic Pain Relief: Gel-infused memory foam contours to your curves, evenly distributes weight, and aligns your spine to ease back pain and pressure points.

🔹2-Layer Adjustable Firmness: Flip between a firm top and an extra-firm bottom. Tailored your comfort with the latest innovative tech.

🔹Machine Washable Cover: A premium zipper design allows the cover to be removed periodically for cleaning.

🔹Non-slip Bottom: Equipped with adjustable elastic straps and a non-slip bottom, it effectively prevents sliding.

🔹No Odor & Fiberglass: CertiPUR-US foam keeps you away from odor, fiberglass, and other toxic materials.
🔹Stomach & Back Sleepers: Medium firm prevents their hips from sinking.

🔹Heavier Sleepers: A firmer surface for adequate support.

🔹 Budget-conscious Shopper: Extend the life of an old mattress instead of replacing it.

Thickness
Size
Mattress Sizes and Dimensions Chart
Mattress Size Dimensions
(in. / ft. / cm)
Best For Ideal Room Size
King 76" x 80" in.
6.33' x 6.67' ft.
193.04 x 203.2 cm
Couples with
kids/pets
12' x 12'
California King 72" x 84" in.
6' x 7' ft.
182.88 x 213.36 cm
Tall people who
want extra legroom
11' x 13'
Queen 60" x 80" in.
5' x 6.67' ft.
152.4 x 203.2 cm
Couples
(2 persons)
10' x 10'
Full 54" x 75" in.
4.5' x 6.25' ft.
137.16 x 190.5 cm
Single adults,
Teenagers
9' x 9.5'
Twin XL 38" x 80" in.
3.25' x 6.67' ft.
99.06 x 203.2 cm
College dorm rooms,
growing kids
8' x 10'
Twin 38" x 75" in.
3.25' x 6.67' ft.
99.06 x 190.5 cm
Kids, bunk beds,
small bedrooms, dorms
7' x 9.5'
Room sizes are guidelines — allow at least 2-3 feet around the bed for walking space (nightstands, dressers).
Width x Length format applies to all dimensions. Actual mattress dimensions may vary slightly by brand.
Starting from
Sale price$109.99 Regular price$137.49

Talk to a Sleep Genius
Chat Now
+1 (619) 313-6011
365-Night Trial

365-Night Trial

Take a full year to decide if our mattress is right for you.
Read More
10-Year Warranty

10-Year Warranty

Experience 10-year support for your mattress.
Read More
Free Shipping

Free Shipping

Enjoy complimentary free shipping across the U.S.
Read More
Arrives in 2-5 Days

Arrives in 2-5 Days

USA assembly ensures all products are delivered in 2 to 5 days.
Read More

Sky Cool. Rock Firm.

Cooling gel memory foam pulls heat away, ensuring a fresh sleep. An extra-firm profile delivers responsive support for back and stomach sleepers.

Open-cell Airflow

Crafted with gel-infused foam with an open-cell structure, this mattress toper promotes a comfortable sleep environment, helping you feel relaxed and cared for through effective temperature regulation and even heat distribution.

Slow Rebound & Pain-Free

The gel memory foam rebounds slowly, which helps conform to your body curves and distribute weight evenly to align the spine and alleviate pressure points, while keeping motion transfer low for a truly pain‑free, restorative sleep.

Adjustable Firmness

The innovative two-layer foam design allows for customizable comfort. The top side provides a firm feel, while the bottom side offers an extra-firm sensation, achieving the perfect balance of firmness tailored to your preferences.

Compressed & Rolled Box

Conveniently compressed & rolled into a vacuum-sealed box, this packaging makes shipping straightforward and stress-free, helping you feel assured and at ease with your order.

Mattress Size Guidance

While mattress sizes vary from brand to brand, the chart below shows the typical dimensions of each bed, along with sleeper profiles and the recommended minimum room size.

Not Sure?

Size Guidance Starts Here

Twin

38"x75"

Full

54"x75"

Queen

60"x80"

King

76"x80"

Mattress Size
Dimensions
Minimum Recommended Room Size
Number of sleepers
Best For Sleeper Height
Twin

38" x 75"

7' x 9.5"

1

Up to 6"

Twin XL

38" x 80"

8' x 10"

1

6" - 6'4"

Full

54" x 75"

9' x 9.5"

1-2

Up to 6"

Queen

60" x 80"

10' x 10"

1-2

6" - 6'4"

King

76" x 80"

12' x 12"

2+

Up to 6'4"

California King

72" x 84"

11' x 13"

2+

6'5" or taller

Because each BedStory mattress is carefully crafted by hand, slight variations in size may occur-up to 2 inches on any side. Every mattress is compressed, rolled, and shipped for easy delivery right to your door.

Frequently Asked Questions

Quickly find information you really care about.

How does the adjustable firmness work?

-

The topper is designed with a unique 2-layer foam. The top side for a firm feel, or flip it to the bottom for extra-firm support—allowing you to customize comfort without buying two toppers.

Is the cover removable and washable?

+

No. Infused with cooling gel and designed with a ventilated open-cell system to enhance airflow, which helps moisture wicking and temperature regulation.

Does this topper good with back pain?

+

Yes. The dual-layer firm memory foam is engineered to relieve pressure points, evenly distribute body weight, and support spinal alignment, making it especially beneficial for reducing back and hip discomfort.

Is the topper safe for people with allergies or chemical sensitivities?

-

Our CertiPUR-US-certified memory foam is free of harmful chemicals, including formaldehyde and heavy metals, ensuring a safe sleeping environment. Plus, bamboo charcoal is naturally hypoallergenic, offering added peace of mind!

Will there be an initial odor?

+

CertiPUR-US and Oeko-Tex certified memory foam ensure there are peculiar smell and no odor.

Does it contain fiberglass?

+

It is CertiPUR‑US and OEKO‑TEX certified, made without harmful chemicals, and confirmed to be fiberglass-free.

How to unbox the mattress topper?

-

Unbox is simple. Just 4 steps. Here are the instructions:

① Clear your bedroom floor and ensure a clean, flat surface near your bed for unboxing.

② Use the small plastic cutter provided to cut open the vacuum-sealed bag and unroll it.

③ Let the topper expand on the bed. Please note, do not sleep on it or cover it with sheets yet. Allow the topper to expand for 48-72 hours. After it has fully expanded, pull the non-slip elastic straps around the corners of your mattress to secure it in place.

④ Cover a bed sheet and enjoy it.

How long does it take to fully expand?

+

The topper comes in a vacuum‑compressed box. Please wait 24‑48 hours for full expansion after unboxing. For best results, keep the room temperature at least 75°F during this process.

What to do if the topper doesn't fully bounce?

+

For lumpy foam, please use a hairdryer on flat areas. The heat helps it bounce back faster.

What payment methods do you accept?

-

We accept Visa, Mastercard, American Express, Discover, PayPal, Amazon Pay, and financing via Affirm. All payments are securely processed via Shopify Payments.

Do you offer financing?

+

Yes! We partner with Affirm to offer 0% APR financing for up to 36 months. Pre-qualification is easy and won’t affect your credit score.

What are your delivery regions?

+

We provide complimentary shipping within the continental U.S. However, we’re unable to deliver to Hawaii (HI), the Virgin Islands (VI), Alaska (AK), Puerto Rico (PR), or to addresses with DPO, FPO, and APO.

How long will it take to ship?

+

Your order will be shipped via FedEx. Processing Time: 1–2 business days Estimated Delivery Time: 2–5 business days (depending on your location)

Does the mattress come with a warranty or a trial period?

+

Yes, we offer a 365‑night sleep trial and lifetime service. Just have a try and decide whether to keep it or return it.

Is there a return fee?

+

Returns are completely free within the trial period. Some photo evidence may be required to help us process your return smoothly.

Customer Reviews

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