Sonno® M Mattress

Designed by Design Within Reach


Item Number: 100148289
Returns and Exchanges

Returns and Refunds

We want you to be delighted with your new purchase. If you need to make a return, we're here to help. Please review your item(s) upon delivery. If there is an issue with your order, contact your local DWR Studio or our customer service team at 800.944.2233  or service@dwr.com within three (3) days of receipt. If you receive a damaged, defective, or incorrect item, we’ll make it right.


We have a few things to keep in mind during the return process:


- Returns must be received in original condition within 30 days of receipt.

- Shipping charges are non-refundable. You will be responsible for outbound and return shipping and delivery charges.

- Returns are accepted only at our warehouse—not at DWR Studios, DWR Outlets, or company headquarters.

- Your refund will be reduced by a restocking charge equal to 10% of the purchase price (accessories, bedding, Sonno mattresses*, and towels are exempt).

- Credit card orders will receive refunds in the form of a credit back to the original account.

- Check and cash payments will be returned via a refund check or DWR Merchandise Credit.

- Be sure to retain the original packing materials, receipt, and all merchandise tags for returns. 


What can’t you return or exchange?


- Custom or special order furniture.

- Floor samples and items purchased from DWR Outlets and eBay.



What if I need to cancel my order?


We can accept cancellation of your order for items that have not yet shipped or are on backorder. In-stock items normally ship within 24–48 hours after an order has been placed.  Once an item has shipped, cancellation is not possible. 


- If you order by credit card, your card will be charged as each item is shipped.

- Custom and special order items cannot be canceled.



What about the 100-Night Sonno® Mattress* Sleep Trial?


Try Sonno risk-free for up to 100 nights (with a minimum of 30). If you decide to return the mattress, contact your local DWR Studio or call 800.944.2233 for a refund and free pickup. 


- One sleep trial per household annually. 

- Delivery fees nonrefundable.



Risk of Loss


All items purchased from Design Within Reach are made pursuant to a shipment contract. This means that the risk of loss and title for such items pass to you upon our delivery to the carrier. If your order is placed with a purchase order, the shipping term of FOB DWR shipping dock will supersede any shipping terms in your purchase order.



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Step 2: Select your Soft or Firm

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Item Number: 100148289

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Additional Information


DWR Exclusive

To design our Sonno Mattress, we worked with a family-run Italian company that’s been studying the science of sleep for 55 years. In that time, its design team has perfected their ability to transform the highest-quality Italian materials into the highest-quality sleep experience. Every component of a Sonno has a benefit – there’s no meaningless fluff – and every mattress is certified STANDARD 100 by OEKO-TEX®, which means you can be certain that every part of it has been tested for harmful substances. Even the way Sonno ships is revolutionary, thanks to an innovative “bed in a box” method that brings end-user and environmental benefits to the entire transportation process. It ships rolled in a compact tube for easy handling and quickly expands to full thickness. Backed by a 100-Night Sleep Trial and a 10-year limited warranty. Made in Italy.

  • Sonno M (M for memory foam) makes you feel like you’re floating. You’ll rest naturally, isolated from vibrations and movement that interrupt sound sleep.
  • Ships rolled and vacuum-sealed in a compact box.
  • Cover is not removable.
  • 100-Night Sleep Trial: Try Sonno risk-free for up to 100 nights, and a minimum of 30. One sleep trial per household annually. Delivery fees nonrefundable.

Product Details


Twin: H 8" W 39" D 75" Full: H 8" W 54" D 75" Queen: H 8" W 60" D 80" King: H 8" W 76" D 80"


Memory foam; support foam; polyester cover (not removable).

Shipping Info

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It is in stock and ready to ship, the message "It is in stock and ready to ship!" That means its on hand in our warehouse and will leave within 48 hours of purchase.


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Easy sleeping
The twin Sonno Mattress that I bought is perfect -- as firm as I'd hoped and without any uncomfortable spots from springs.
November 11, 2019
5 months ago

Product Q&A

Product Q&A

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I bought a queen size Sonno mattress when it first came out and still love it. It's held up perfectly over the years. I want to buy another one for a second house, but now you have three different Sonno mattresses. Which is closest to the original version?
Merrill M on Dec 20, 2019
BEST ANSWER: Hi Merrill,

Please let us know which Sonno mattress you had from the original launch (Sonno Prima Medium, Sonno Prima Firm, Sonno Aloe, Sonno Versa, or Sonno Gel) this will help us determine the best fit for your new model!
Which Sonno mattress would fit the Matera twin bed best? The mattress I have now is too high so it obscures the beautiful headboard more than I'd like.
Diana H on Feb 16, 2020

Depending on comfort level and features needed, the Sonno M has a height of 8", the Sonno MG has a height of 8.5", and the Sonno MGV has a height of 9".
What sheets best fit this mattress? The sheets DWR has have pockets that are too deep and do not fit well. This mattress is 8" deep and most sheets have a 15" pocket. Thanks!
Carolyn E on Jan 11, 2020
BEST ANSWER: Hi Carolyn,

The DWR linen sheets will fit the Sonno M Mattress perfectly, depending on the size of the bed used any extra length can be tucked underneath the mattress.

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