BeautySleep Coastline 12" Innerspring Mattress in a Box (Available in Firm & Plush Pillow-Top)
BeautySleep Coastline 12" Innerspring Mattress in a Box (Available in Firm & Plush Pillow-Top)
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Simmons Beautyrest

BeautySleep Coastline 12" Innerspring Mattress in a Box (Available in Firm & Plush Pillow-Top)

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BeautySleep Coastline 12" Innerspring Mattress in a Box (Available in Firm & Plush Pillow-Top)BeautySleep Coastline 12 Innerspring Mattress in a Box Available in Firm Plush Pillow TopBeautySleep Coastline 12 Innerspring Mattress in a Box Available in Firm Plush Pillow TopBeautySleep Coastline 12 Innerspring Mattress in a Box Available in Firm Plush Pillow TopBeautySleep Coastline 12 Innerspring Mattress in a Box Available in Firm Plush Pillow TopBeautySleep Coastline 12 Innerspring Mattress in a Box Available in Firm Plush Pillow TopBeautySleep Coastline 12 Innerspring Mattress in a Box Available in Firm Plush Pillow TopBeautySleep Coastline 12 Innerspring Mattress in a Box Available in Firm Plush Pillow TopBeautySleep Coastline 12 Innerspring Mattress in a Box Available in Firm Plush Pillow Top
Bed SizeTwin
Mattress Comfort LevelFirm

Smart summary

Generated by AI
  • Easy To Set Up

    Easy To Set Up

    Simply unbox, unwrap, and unroll to have it ready in minutes.
  • Sleeps Cool All Night

    Sleeps Cool All Night

    Gel memory foam and channeled design promote airflow to prevent overheating.
  • Consistent Back Support

    Consistent Back Support

    Eight-inch pocketed coils contour to your body for stable alignment.
  • Firm Or Plush Options

    Firm Or Plush Options

    Choose a structured feel or a cushioning pillow-top.
  • Fits Most Bed Frames

    Fits Most Bed Frames

    Compatible with platform bases, box springs, and adjustable foundations.

Specifications

Firm Mattress

  • Twin: 38" x 75", 12" height, 80 lbs
  • Full: 53" x 74.5", 12" height, 85 lbs
  • Queen: 60" x 80", 12" height, 86 lbs
  • King: 76" x 80", 12" height, 90 lbs

Plush Pillow Top Mattress

  • Twin: 38" x 75", 12" height, 85 lbs
  • Full: 53" x 74.5", 12" height, 90 lbs
  • Queen: 60" x 80", 12" height, 92 lbs
  • King: 76" x 80", 12" height, 98 lbs
Current price is $315.00
Prices may vary in club and online
How do you want your item?

Shipping

Free for Plus on eligible orders over $50
Columbus, 43215
Arrives by Wed, Nov 11
Return or replace anytime.
Sam's credit card
Limited time! Get a $60 statement credit when you open an account between 10/28-12/2 and use it to make $30 in eligible Sam’s Club purchases within 30 days¹
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About this item

Product details

Comfortable Sleep from the First Night

The 12” BeautySleep® Coastline Quilted Mattress in a Box is crafted to provide exceptional comfort and support. Featuring a soft quilted surface and breathable foams, this mattress ensures airflow for a cool and refreshing sleep. Its antimicrobial layer* helps maintain freshness, while the Original Beautyrest® Pocketed Coil® Technology delivers consistent, reliable support.

Advanced Foam and Coil Technology

Experience the benefits of AllCool™ Gel Memory Foam, which contours to your body to relieve pressure, and AirCool® Foam with a channeled design for enhanced airflow. The 8" layer of Original Beautyrest® Pocketed Coil® Technology, combined with supportive base foam, offers stable and comfortable support throughout the night.

Firm or Plush Pillow-Top Options

Choose between a firm feel for structured support or a plush pillow-top for extra cushioning and reduced motion transfer. The plush option includes AllCool™ Gel Foam for added cooling comfort. Both options feature CertiPUR-US® Certified Foams, ensuring quality materials you can trust.

Convenient Setup and Compatibility

This mattress ships rolled in a box for easy setup—simply unbox, unwrap, and unroll. It is compatible with platform foundations, solid surface bed frames, and adjustable bases, offering flexibility to suit your bedroom needs. With a height of 12", it provides a traditional mattress feel.

100 Night In-Home Trial

Enjoy up to 100 nights to adjust to your new mattress, risk-free. If you're not completely satisfied, return it for a full refund. For warranty concerns, contact the BeautySleep Customer Service team at (888) 802-2948. Elevate your sleep experience with over a century of expertise in crafting quality mattresses.
  • Firm Feel – Structured support for a restful sleep.
  • Plush Pillow‑Top – Extra cushioning for softer comfort.
  • 8" Original Beautyrest® Pocketed Coil® Technology – Consistent, comfortable support.
  • AllCool™ Gel Memory Foam – Pressure relief and contouring comfort.
  • AirCool® Foam – Promotes airflow for a cooler sleep.
  • CertiPUR‑US® Certified Foams – Quality materials you can trust.
  • Antimicrobial Layer – Helps keep your mattress fresh.*
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Key specifications

Specifications

Firm Mattress

  • Twin: 38" x 75", 12" height, 80 lbs
  • Full: 53" x 74.5", 12" height, 85 lbs
  • Queen: 60" x 80", 12" height, 86 lbs
  • King: 76" x 80", 12" height, 90 lbs

Plush Pillow Top Mattress

  • Twin: 38" x 75", 12" height, 85 lbs
  • Full: 53" x 74.5", 12" height, 90 lbs
  • Queen: 60" x 80", 12" height, 92 lbs
  • King: 76" x 80", 12" height, 98 lbs

Member ratings & reviews

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Showing 1-3 of 20 reviews

Jan 26, 2026
Reviewer name: Duke32
5 out of 5 stars
5 out of 5 stars review

Great Product!

I recently got this mattress and it has exceeded my expectations. The quality is great! I am a bigger guy and provides plenty of support and I don't feel like I'm dipping all the way through the mattress. It's very comfortable on my back and hips. I don't sleep hot like I used to. Honestly, I am very impressed and would definitely recommend this mattress.

Review from Beautyrest
Helpful?0W58TAUFUYKY19924152301
Feb 2, 2026
Reviewer name: counting-sheep-1995
5 out of 5 stars
5 out of 5 stars review

A Dream Come True!!

From the moment I laid down on this mattress, I knew something was different. The Coastline strikes that perfect balance between supportive and plush – it cradles your body without that quicksand feeling you get with some memory foam mattresses. I woke up that first morning without my usual lower back stiffness, and honestly thought it might be a fluke. After a month of sleeping on this mattress, this is my new normal! The edge support is surprisingly robust – I can sit on the edge to put on shoes without feeling like I'm going to roll off. After a month, there's zero sagging or indentation. This mattress feels like it's built to last. The BeautySleep Coastline delivered on every promise. Better sleep, less pain, and mornings where I actually feel rested. If you're on the fence about investing in a quality mattress, this is your sign. Your future well-rested self will thank you! Would I recommend it? Absolutely, without hesitation. Sweet dreams await!

Review from Beautyrest
Helpful?0W58TAUFUYKY19924152301
Feb 10, 2026
Reviewer name: Jack
5 out of 5 stars
5 out of 5 stars review

A Sleep Revolution in a Box

Receiving this mattress as part of a product trial was honestly a game-changer for my sleep. I was skeptical that a bed in a box could live up to the hype, but from the very first night, it felt like sleeping on a supportive cloud. It perfectly balances pressure relief on my shoulders with firm support for my lower back, and the temperature regulation is spot on—I haven't overheated once.

Review from Beautyrest
Helpful?0W58TAUFUYKY19924152301
Current price is $315.00
Prices may vary in club and online
How do you want your item?

Shipping

Free for Plus on eligible orders over $50
Columbus, 43215
Arrives by Wed, Nov 11
Return or replace anytime.

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