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Serta Five Star Mattress Tranquility 8" Medium - Twin Bed Mattress - Zoned Lumbar Support, Cooling Foam, Pressure Relief - Bed-in-a-Box - 100 Night Trial, 10-Year Limited Warranty

  • Based on 42 reviews
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Availability: 19 left in stock
Fulfilled by Amazon

Arrives Monday, Jun 15
Order within 21 hours and 46 minutes
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Style: Level 2 Medium 8"


Size: Twin


Features

  • MEDIUM-FIRM COMFORT LEVEL: This twin mattress offers balanced support that works for a variety of sleep styles-especially combination sleepers
  • DURABLE SUPPORT FOR UNDISTURBED SLEEP: Durable coils reduce partner disturbance, provide lasting support across the twin size mattress surface; BUILT TO LAST - CERTIPUR-US CERTIFIED: CertiPur-US certified and backed by a 10-year limited warranty
  • ZONED LOWER BACK SUPPORT FOAM: 3-Zone Support Foam mattress provides enhanced pressure relief and promotes proper spinal alignment
  • EASY SETUP - MATTRESS-IN-A-BOX: Delivered in a box and made in the USA with global components. Setup of this mattress in a box takes minutes - just Unbox, Unroll, Unwind
  • PRESSURE-RELIEVING COMFORT FOAMS: PillowSoft Aire & PillowSoft Foams cradle shoulders, hips, and knees for a more comfortable night. BREATHABLE, COOLING MATERIALS: Breathable fabrics and foams in this twin mattress promote airflow for cooler sleep

Description

The Serta Five Star Mattress Tranquility 8 Medium Mattress delivers trusted comfort in a compact, affordable design. Zoned support and breathable materials ensure a cool, supported sleep surface, while gentle contouring foams reduce pressure throughout the body. Ideal for budget-conscious shoppers or secondary bedrooms, this mattress-in-a-box expands quickly and offers all- night comfort without the wait or the tools. 100 Night Trial, 10-Year Limited Warranty. This zoned support mattress offers nighttime sleep comfort for hot sleepers.

Brand: Serta


Size: Twin


Product Dimensions: 74.5"L x 38"W x 8"Th


Item Weight: 50 Pounds


Item Firmness Description: Medium


Top Style: Tight Top


Cover Material: Fabric


Number of Layers: 5


Fill Material: Memory Foam


Special Feature: Breathable, Durable, Low Motion Transfer, Pressure Relief, Temperature Regulating


Item Firmness Description: Medium


Number of Layers: 5


Additional Features: Breathable, Durable, Low Motion Transfer, Pressure Relief, Temperature Regulating


Mattress Coil Type: Pocketed Coil


Construction Type: Innerspring


Is Customizable?: No


Portable: No


Size: Twin


Item Dimensions L x W x Thickness: 74.5"L x 38"W x 8"Th


Item Weight: 50 Pounds


Item Dimensions: 74.5 x 38 x 8 inches


Item Depth: 8 inches


Cover Material: Fabric


Fill Material: Memory Foam


Product Care Instructions: In order to protect your mattress from stains and spills, we recommend using a mattress protector. This will also help with the overall health and lifespan of your mattress., To clean your mattress, we suggest applying baking soda to the soiled area and letting it stand for about 15 minutes. Then, vacuum and repeat as needed. It's important that you also air the product out as much as possible., We do not recommend applying liquids to the product. Applying liquids may stain the fabric and could potentially make the soiled area worse. Moisture or chemicals applied directly to the mattress can cause premature breakdown of the foam and damage the product.


Mattress Comfort Layer Material: Comfort Foam


Material Type: Memory Foam, Wrapped Coils


Brand Name: Serta


Model Name: Serta Five Star Mattress Tranquility 8” Medium Bed in a Box


Product Benefits: Back Pain Relief, Improves Sleep, Pressure Relief, Reduces Toss & Turn, Stress Relief


Model Number: 50


UPC: 198167037660


Mattress Type: Standard Mattress


Manufacturer: Serta Simmons Bedding, LLC.


Set Name: Tranquility


Manufacturer Part Number: 50


Unit Count: 1.0 Count


Included Components: Mattress


Item Type Name: Bed Mattress Conventional


top-style: Tight Top


Color: Off-white


Style Name: Level 2 Medium 8"


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jun 15

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Great quality
Style: Level 2 Medium 8" Size: Queen
You can’t beat the price on this mattress. It’s super comfortable and the firmness is perfect. Glad we went with Serta.
Reviewed in the United States on March 24, 2026 by Angel alderete

  • Good quality comfort to sleep
Style: Level 2 Medium 8" Size: Full
I bought this bed for myself but decided to give it to my wife who has trouble sleeping, she says it’s the best sleep she’s had in a long time, she prefers medium mattresses so that is what I ordered.
Reviewed in the United States on June 4, 2026 by Jeffrey J

  • Nice, but possible size issues. Nice, but possible size issues.
Style: Level 2 Medium 8" Size: Twin
First impressions, we opened this mattress about an hour ago. It seems well made. We typically like and seek to buy Serta. It did start expanding immediately after opening. So far, after about an hour, it has expanded to about 5.5" (we purchased an 8"). I believe it will fluff a bit more, but not sure if it'll make the full 8". Here's the real downer though; a twin mattress is supposed to be around 75" in length. This mattress measures at about 71.5" leaving quite a lot of gap at the top and bottom. I do not believe that the length is going to fill out. This is very disappointing in regard to the overall fit. I checked the twin xl and the price is around $100 more (supposed to be 80"). The conundrum is, would a Serta twin xl be less than the stated length and therefore fit, or will it be true to size, and be too long? ... show more
Reviewed in the United States on August 5, 2025 Reviewed in the United States on August 5, 2025 by Lynn Lopez

  • Exceeded expectations
Style: Level 2 Medium 8" Size: Queen
We are life long campers having owned two travel trailers and two class A rigs. With each new rig we purchased this mattress because after a long day of driving and then hiking there is nothing better than a good nights sleep! Just as good as our home mattress. Would recommend to my best friend.
Reviewed in the United States on May 16, 2026 by CamperRon

  • Too Short Too Short
Style: Level 2 Medium 8" Size: Twin
It’s too short. I just measured it because I wondered if I bought too big of a bed or what and it’s only 71 inches long not 75 so there’s a large gap.
Reviewed in the United States on May 21, 2026 Reviewed in the United States on May 21, 2026 by Jens Joys and Journeys

  • I had a great nap on the new mattress. I'm very satisfied with this mattress.
Style: Level 2 Medium 8" Size: Twin
This new mattress fits very well on our new daybed. I have used it several times and had a great nap. I feel it is awesome for the money. And the firmness was just right. I am very satisfied with this mattress. We will be getting another mattress for the trundle.
Reviewed in the United States on September 13, 2025 by Jacquie Thomas

  • Comfortable bed
Style: Level 2 Medium 8" Size: Twin
Seems comfortable. The only issue I had was with Amazon shipping. I ordered 2 and they sent and delivered 1. Had to jump through hoops to get the other.
Reviewed in the United States on April 26, 2026 by Andrew Strine

  • Firm, but comfortable
Style: Level 2 Medium 8" Size: Twin
Very comfortable
Reviewed in the United States on April 30, 2026 by Amazon Customer

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