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The Casper Foundation - 2 of 4The Casper Foundation - 3 of 4The Casper Foundation - 4 of 4
The Casper Foundation - 1 of 4

The Casper Foundation - Twin Extra Long

16 Questions
$299.00

In Stock

Free & easy returns
Free & easy returns
Return this item by mail or in store within 90 days for a full refund.
Eligible for registries and wish lists
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With Target Circle™ Card (restrictions apply)

About this item

Highlights

  • Easy to assemble without tools
  • Slats are positioned a perfect four inches apart for optimal support
  • Can be quickly disassembled if you are moving or need to maneuver around tight corners
  • Designed in the USA, Assembled in China
  • 120-night risk-free trial

Description

The foundation provides excellent support under any mattress (especially a Casper!) and can be assembled in minutes.

ABOUT CASPER
Casper was created to re-imagine sleep from the ground up, beginning with its obsessively engineered, outrageously comfortable mattress. All of Casper's sleep products are developed in-house by the company's award-winning R&D team.

Casper was recently named one of Fast Company's Most Innovative Companies in the World and its eponymous mattress was crowned one of TIME Magazine's Best Inventions.

FAQs
What is the 120-Night Trial?
We believe you should actually sleep on a product to decide if you like it. So we give you 120 nights to test out all Casper products in your own home. If you don't love it, we'll give you a full refund.

Why does the Casper need a foundation?
The foundation helps support the Casper while optimizing air flow to ensure a restful night's sleep.

Can I put the foundation on the floor?
We do not recommend putting the foundation directly on the floor as doing so can cause wear to the chambray cover.
Dimensions (Overall): 7.5 Inches (H) x 37.5 Inches (W) x 79 Inches (D)
Weight: 53 Pounds
Material: MDF Composite (Medium-Density Fiberboard) (Frame)
Textile Material: 90% Polyester, 10% Polypropylene
Assembly Details: Adult Assembly Required, No Tools Needed
Industry or Government Certifications: Not Listed or Certified
Battery: No Battery Used
Care & Cleaning: Spot or Wipe Clean
Warranty: 2 Year Limited Warranty. To obtain a copy of the manufacturer's or supplier's warranty for this item prior to purchasing the item, please call Target Guest Services at 1-800-591-3869
Street Date: June 18, 2017
TCIN: 52375259
UPC: 192472004775
Item Number (DPCI): 010-02-0025
Origin: Imported
If the item details aren’t accurate or complete, we want to know about it.

all-mattress

mattress
Mattress Size Average Mattress Dimensions
Twin 39" x 75"
Twin XL 39" x 80"
Full 54" x 75"
Queen 60" x 80"
King 76" x 80"
California King 72" x 84"

All Sizes in Inches Unless Otherwise Stated

Shipping details

Estimated ship dimensions: 75.39 inches length x 17 inches width x 9.13 inches height
Estimated ship weight: 58 pounds
We regret that this item cannot be shipped to PO Boxes.
This item cannot be shipped to the following locations: American Samoa (see also separate entry under AS), Guam (see also separate entry under GU), Northern Mariana Islands, Puerto Rico (see also separate entry under PR), United States Minor Outlying Islands, Virgin Islands, U.S., APO/FPO, Alaska, Hawaii
This item ships in its manufacturer’s packaging, revealing what’s inside. ·

Return details

This item can be returned to any Target store or Target.com.
This item must be returned within 90 days of the date it was purchased in store, delivered to the guest, delivered by a Shipt shopper, or picked up by the guest.
See the return policy for complete information.
Guests who order a new mattress, mattress set, futon or futon mattress for delivery to an address in California may be eligible to schedule pickup of a used mattress, mattress set or futon mattress. Please refer to California Used Mattress Recovery Act for more information.See more details.

Q: What is the exact width dimension of the outside of this slat foundation, I see 59.5 wide but have seen in a store that it is actually 60" wide

submitted by P - 10 months ago

  • A: Slats - outer dimension is 59.75" and our specification is 59.5" +/- 0.25".

    submitted byCasper Sleep Team - 3 months ago
    Brand expert

Q: If I am not happy with this product, can it be returned?

submitted by Jenny S - 4 years ago

  • A: Hi there! You can return this item to Target within 30-days of purchase.

    submitted byCasper Sleep Team - 4 years ago
    Brand expert

Q: how much weight can a queen sized foundation hold?

submitted by TT - 4 years ago

  • A: Hi there, our Foundation has been tested to withhold at up to 750 lbs. We hope this helps.

    submitted byCasper Sleep Team - 4 years ago
    Brand expert

Q: What is the reason that this foundation should not be placed on the floor or carpet? One of your answers said, "We don't recommend placing the foundation directly on the floor, even a carpeted one!"

submitted by MX - 4 years ago

  • A: Great question, placing your foundation directly on the floor may not allow for sufficient airflow. When airflow is restricted this can sometimes lead to mold and mildew growth which risks damaging the integrity of the foundation. That being said, placing your foundation directly on the floor will void your warranty.

    submitted byCasper Sleep Team - 4 years ago
    Brand expert

Q: Hello, does this foundation allow to add individual legs direction to the base?

submitted by mga - 5 years ago

  • A: We do not suggest adding legs to your foundation. The foundation works much like a box spring and should be placed on a frame.

    submitted byCasper Sleep Team - 5 years ago
    Brand expert

Q: If getting a hybrid is the foundation needed or can one use standard box spring?

submitted by RetinChs - 6 years ago

  • A: A foundation ensures that mattresses sleep like they should. Some older box springs or foundations don’t provide a solid surface, causing mattresses to sag from the breaks in support. A strong and level foundation helps mattresses to perform at their peak for a decade or more, no matter what kind of bed frame they sit on. Casper foundations and mattresses (including our hybrids) are the perfect pair. We spent over a year developing the Casper foundation, so its design has the same considerations as our mattresses. It comes in the classic Casper chambray, so it goes perfectly with the rest of the Casper products.

    submitted byCasper Sleep Team - 6 years ago
    Brand expert

Q: If you have a king size bed frame with a wooden support in center, should you purchase two twin XL foundations

submitted by Sue - 7 years ago

  • A: We recommend purchasing the King Foundation! It should position itself perfectly on the bed frame and the sturdy construction of the King Foundation is the ideal setup for any Casper mattress.

    submitted byCasper Sleep Team - 7 years ago
    Brand expert

Q: Hi, does the foundation fold up? This may be a dumb question as I know that is what your company is known for--but just making sure! We have a very tight space this needs to get into!

submitted by Tina - 7 years ago

  • A: Hello, Tina! That is absolutely not a dumb question considering that traditional boxsprings are such a pain to fit in tight spaces! Our foundation comes disassembled and packaged in a box that will fit through doorways and up tight staircases. Putting it together requires no tools, either. Plus, if you ever need to move it, you can easily disassemble it again. For reference, here are the foundation box dimensions and weights for each size: Twin: 70.5” x 17” x 10”, 57 lbs Twin XL: 75.5” x 17 “x 10”, 58 lbs Full: 70.5” x 17” x 10", 63 lbs Queen: 75.5” x 17" x 10”, 68 lbs King: 77” x 17” x 10”, 81 lbs Cal King: 79.5” x 17” x 10”, 80 lbs

    submitted byCasper Sleep Team - 7 years ago
    Brand expert

Q: Can you please tell me the measurement between each slat? Thank you Kat

submitted by Kat - 7 years ago

  • A: Hi, Kat! There are 4 inches of space in between each slat in the Casper foundation.

    submitted byCasper Sleep Team - 7 years ago
    Brand expert

Q: I don't see in the information, how many inches high the base is. ??

submitted by Pat - 8 years ago

  • A: Hi, Pat! The Foundation is 7.5 inches tall.

    submitted byCasper Sleep Team - 8 years ago
    Brand expert
See all questions (16)

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Guests are saying

The foundation is highly praised for its ease of assembly, with many guests noting that it can be set up without tools and is manageable even for those with limited strength. It provides a sturdy and supportive base for the mattress, enhancing overall comfort. While some guests experienced minor issues with fit and noise, the majority appreciate its solid construction and compatibility with various bed frames, making it a great addition to their sleep setup.
    Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
    4.6 out of 5 stars with 693 reviews
    100% would recommend
    16 recommendations
    5 out of 5 stars
    19 September, 2026
    originally posted on casper.com
    Image

    Great engineering

    Great engineering
    Mark K.
    Did you find this review helpful?
    3 out of 5 stars
    11 September, 2026
    originally posted on casper.com
    Image

    the fabric around the slats

    the fabric around the slats ripped as i was opening it and busted! it’s okay, but i wish i had bought something else
    Rachel A.
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    5 out of 5 stars
    8 September, 2026
    originally posted on casper.com
    Image

    So so comfortable! - only

    So so comfortable! - only comment is that I wish the foundation was shorter. The bed is quite high.
    Wanda K.
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    5 out of 5 stars
    8 September, 2026
    originally posted on casper.com
    Image

    Great foundation.

    Great foundation.
    Barbara D.
    Did you find this review helpful?
    5 out of 5 stars
    7 September, 2026
    originally posted on casper.com
    Image

    Working perfectly, easy to set

    Working perfectly, easy to set up
    Travis M.
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    5 out of 5 stars
    2 September, 2026
    originally posted on casper.com
    Image

    Great bed very comfortable

    Great bed very comfortable
    Curtis T.
    Did you find this review helpful?
    4 out of 5 stars
    1 September, 2026
    originally posted on casper.com
    Image

    The slat mat seems to

    The slat mat seems to slide around easily- for example when I put on a fitted sheet I can feel it slide.
    Pauline B.
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    4 out of 5 stars
    31 August, 2026
    originally posted on casper.com
    Image

    Does its job

    I don't notice it much which means that it is doing its job
    Tsatsu F.
    Did you find this review helpful?
    5 out of 5 stars
    25 August, 2026
    originally posted on casper.com
    Image

    Wonderful!!

    Wonderful!!
    Gary S.
    Did you find this review helpful?
    5 out of 5 stars
    24 August, 2026
    originally posted on casper.com
    Image

    The foundation is perfect for

    The foundation is perfect for my Casper mattress. It was so easy to assemble that I could do it all by myself and I’m 82 years old and female. How’s that for independence?
    Jean K.
    Did you find this review helpful?
    5 out of 5 stars
    21 August, 2026
    originally posted on casper.com
    Image

    Easy to setup

    The foundation for my mattress was easy to put together without any tools. Because of its size I had to assemble the frame in my garage and then bring into the bedroom. Once placed into the bed frame, it was easy to roll out the slats and unroll the mattress on top. All a little bulky, but light enough to handle. Provides a solid base.
    Lee P.
    Did you find this review helpful?
    2 out of 5 stars
    18 August, 2026
    originally posted on casper.com
    Image

    It is noisy. Also, higher

    It is noisy. Also, higher than my old box springs so I'm having a little trouble getting used to it.
    Valerie K.
    Did you find this review helpful?
    5 out of 5 stars
    18 August, 2026
    originally posted on casper.com
    Image

    I absolutely love my new

    I absolutely love my new Dream Max mattress- there was no "adjustment" period that you're usually warned about - comfort from night one.
    Stephen H.
    Did you find this review helpful?
    1 out of 5 stars
    13 August, 2026
    originally posted on casper.com
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    Found

    It didn’t quite fit together as clean as I thought it would. Also, from the shipping there was a hole in one of the side panels.
    Jeanne W.
    Did you find this review helpful?
    5 out of 5 stars
    12 August, 2026
    originally posted on casper.com
    Image

    Works as intended

    Works as intended
    Penny L.
    Did you find this review helpful?
    5 out of 5 stars
    9 August, 2026
    originally posted on casper.com
    Image

    Fairly easy to assemble. Very

    Fairly easy to assemble. Very supportive.
    Jonathan W.
    Did you find this review helpful?
    5 out of 5 stars
    7 August, 2026
    originally posted on casper.com
    Image

    I love my Casper mattress!

    I love my Casper mattress! It is comfortable, was easy to purchase and to set up! I would definitely recommend this brand!
    Vail M.
    Did you find this review helpful?
    5 out of 5 stars
    2 August, 2026
    originally posted on casper.com
    Image

    Very

    Very
    Brian M.
    Did you find this review helpful?
    5 out of 5 stars
    31 July, 2026
    originally posted on casper.com
    Image

    The Casper foundations are easy

    The Casper foundations are easy to assemble and very sturdy. No issues with them and I don't see why anyone would spend more.
    James B.
    Did you find this review helpful?
    5 out of 5 stars
    31 July, 2026
    originally posted on casper.com
    Image

    I really like it. It’s

    I really like it. It’s low which is good because I just had knee replacement surgery.
    Holly R.
    Did you find this review helpful?

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