Sonno® M Mattress

Designed by Design Within Reach


Item Number: 100148289
Returns and Exchanges

Returns and Exchanges

Please inspect your purchase immediately upon delivery. If there is a problem with your order, contact your local DWR Studio or our Customer Service team at 800.944.2233 within three (3) days of receipt. You may also contact us at service@dwr.com. If you receive a damaged, defective or incorrect item, we will work with you to make things right.

If you wish to return an item, your refund will be reduced by a restocking charge equal to 10% of the purchase price (accessories, bedding, Sonno mattresses* and towels are exempt), and you will be responsible for outbound and return shipping and delivery charges. Returns must be received in original condition within 30 days of receipt of order. 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 Design Within Reach Merchandise Credit.

Please be aware that furniture is susceptible to damage during transit. We take great care to pack shipments so that they will arrive safely, so be sure to retain the original packing materials, original receipt and all merchandise tags for any item that you wish to return to us. You may have to provide supplementary packing materials if the outer carton has been worn during the original trip out to you.

Shipping charges are not refundable. We do not accept any returns or exchanges on custom or special order furniture. Floor samples and items purchased from DWR Outlets and eBay are sold as is, and all sales are final.

Returns are accepted only at our warehouse; they are not accepted at DWR Studios, DWR Outlets or our company headquarters. To start the return process, please contact Customer Service at 800.944.2233 or service@dwr.com.

*100-Night Sonno® Mattress Sleep Trial

Try Sonno risk-free for up to 100 nights, and a minimum of 30. If you decide to return it, contact your local DWR Studio or call 1.800.944.2233 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.

Cancellation Policy

In-stock items normally ship within 24–48 hours after an order has been placed. If you order by credit card, your card will be charged as each item is shipped. We will accept cancellation of your order for items that have not shipped or that are on backorder. Once an item has shipped, cancellation is not possible. Custom and special order items cannot be cancelled.

DWR Exclusive


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Step 2: Select your Soft or Firm

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Item Number: 100148289

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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.

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
4 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!
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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