Tuck.com's review gives WinkBeds the highest possible rating of Excellent for their Off-gassing factor, saying, "Our testing and data analysis shows that buyers shouldn't expect any odors to accompany their winkbeds mattress."
The Sleep Judge's review rated them an 8.0/10 for off-gassing, saying, "Some complaints of off-gassing (mine wore off in a little over a day)"
— reviewed WinkBeds on November 14, 2018, Read all 2 low-odor mattresses reviews.
Purple's website says their products do not off gas, "Purple achieves its goal of helping people feel better by making safety a priority. Purple’s products have no off-gassing and only use CertiPUR-US® Certified foam with our mattress."
Tuck.com's review rated Purple's Off-gassing factor as Very Good (the second highest rating), saying, "Very few Purple mattress owners report strong, persistent off-gassing odor."
— reviewed Purple Mattress on November 13, 2018, Read all 2 low-odor mattresses reviews.
Tuck.com's reviews gave Avocado a rating of Very Good (the second highest rating) for Off-gassing and say, "Natural latex emits minimal off-gassing. Some initial odors may be present, but they tend to dissipate within a few days."
The Avocado Mattress website gives a more detailed explanation about how they avoid strong smells"
"Any mattresses made with petroleum-based foams, memory foams, chemical adhesives and chemical flame retardants will "off-gas" — which means that they release Volatile Organic Compounds (VOCs) as they age.
However, we do not use polyurethane foams, memory foams, chemical flame retardants or chemical adhesives between the comfort layers of our mattresses. Instead, we use 100% natural eco-INSTITUT® certified Dunlop latex, natural Joma® New Zealand Wool, and GOTS certified organic cotton. These materials are GREENGUARD Gold certified for low emissions and quality assurance by UL Environment.
In particularly humid climates, you may notice a very slight natural odor when your mattress arrives, which will dissipate quickly. This is because your mattress has been sealed after it was made in order to facilitate shipping. This is natural and not a chemical odor."
— reviewed Avocado Mattress on November 13, 2018, Read all 2 low-odor mattresses reviews.
Saatva's website says this about the possibility of off-gassing with their mattresses, "We do "no" off gassing where we manufacture our products. There is a small amount of off gassing done at our suppliers facility where the foam is made. All foams must be stable when they are shipped to our manufacturing partners."
Tuck.com's review reported very little smell, and rated their off-gassing factor as Excellent (the highest possible rating) and said, "The Saatva mattress emits some off-gassing (due in part to the polyfoam and memory foam layers), but most owners report that the odors dissipate within three to five days of unpackaging the mattress."
— reviewed Saatva on November 14, 2018, Read all 2 low-odor mattresses reviews.
Tuck.com's review of Helix Sleep mattresses noted some initial order. They scored their off-gassing factor as Good (below Very Good and Excellent) and said, "Helix Sleep mattresses typically produce a small amount of off-gassing that usually dissipates within a couple of days."
Sleep Like the Dead's review rated Helix's mattresses between a B and B- for "No Initial Smell" category and said, "Less than 5% of owners (1 in 20) report a significant and enduring unpleasant initial odor."
— reviewed Helix Sleep on November 14, 2018, Read all 2 low-odor mattresses reviews.
Tuck.com's review of Bear Mattress says there can be a slight odor, saying, "Some Bear owners report off-gassing smells when their bed is new, but the mattress is not associated with excessive odors."
The Sleep Judge's review was very positive about the low odor, saying, "With some mattresses, you may notice a strong chemical smell when you initially unbox, and this can be bothersome. However, with the Bear Mattress, this was not remotely an issue."
— reviewed Bear Mattress on November 14, 2018, Read all 2 low-odor mattresses reviews.
Tuck.com's review of Eight Sleep mattresses noted a very mild smell, and rated their off-gassing factor as Good (below Very Good and Excellent). They said, "There is little to no off-gassing with the Saturn and should dissipate within a few days of unboxing."
The Sleep Judge's review said, "There was slight offgassing when I opened up my Jupiter+ mattress, and it took about two days for it to completely clear off. If this bothers you, you may want to allow 48 hours of airing time before use."
— reviewed Eight Sleep on November 14, 2018, Read all 2 low-odor mattresses reviews.
Sleep Delivered's review reports little smell from Dromma's mattresses, saying, "I have yet to find any customers complaining about off-gassing, and we didn’t notice any. Even if there is a little of it, as can be expected from a compressed foam mattress shipped in a box, it is minimal and unlikely to affect you. I guess it’s possible that more ‘smell-sensitive’ sleepers could experience a bit of off-gassing in the first few hours of unboxing the Drömma Bed."
The Sleep Judge's review says there is a slight smell at the beginning, saying, "Upon opening the Dromma Bed, you could detect a very slight odor, but it quickly dissipated. After just a few hours, it had diminished. Therefore, if offgassing is something that really bothers you, you can rest assured it won’t be a problem with this product."
— reviewed Dromma Bed on November 13, 2018, Read all 2 low-odor mattresses reviews.
Best Mattress Reviews' review noted minimal odor, saying, "New mattress smells are most common when a mattress has been compressed for shipping, but the Aviya mattress is delivered without any compression. As a result, you can expect little or no odor from the Aviya mattress."
Hack to Sleep's review also noticed no off gassing, saying, "So if you’re not a fan of that off-gassing smell you get with new mattresses, you won’t have to worry too much about that with Aviya. More natural materials reduce the release of chemicals into the environment and your home."
— reviewed Aviya Mattress on November 13, 2018, Read all 2 low-odor mattresses reviews.
Sleep Like The Dead's review said that problems with Zinus mattresses smelling depended on which model you got, saying, "Zinus foam models are 2 to 3 times more likely to off gas than spring models. About 12% of foam model owners (1 in 8) report a significant problem. (See memory foam off gassing for general analysis.)" The foam model was given a D+ and the spring model got a B-.
Tuck.com gave them a rating of Good (below Very Good and Excellent) and said, "Off-gassing is a common complaint among Zinus memory foam owners, but those who own innersprings report little to no odor."
— reviewed Zinus on November 13, 2018, Read all 2 low-odor mattresses reviews.
Tuck.com's review reports mild odor, and rates their off-gassing factor as Good (with Very Good and Excellent being higher possible ratings). They say, "There is some odor potential with the Tomorrow mattress, but most owners report that the smells dissipate within a few days."
The Sleep Judge review says there are some complaints of off-gassing, and rated Tomorrow Sleep's off-gassing factor an 8.0/10.
— reviewed Tomorrow Sleep on November 14, 2018, Read all 2 low-odor mattresses reviews.
Our Sleep Guide's review said, "Once you take this mattress out of the box and plastic there may be a bit of trapped gasses that will escape. This should be very minimal and not be overly noxious. Almost all bed in a box mattresses have a bit of odor attached from sitting tightly in plastic. Some more noticeable than others, but very few that have cause for any concern."
Sleep Like the Dead's review rated Brooklyn Bedding's mattresses a B for "No initial odor" factor, saying, "About 5% of owners (1 in 20) have reported a significant and enduring unpleasant initial off gassing odor."
— reviewed Brooklyn Bedding on November 14, 2018, Read all 2 low-odor mattresses reviews.
Tuck.com's review of Nectar Sleep mattresses rates their Off-gassing quality as Fair (below Good, Very Good, and Excellent), saying, "Off-gassing odors have been reported for newer Nectar mattresses, but these smells tend to dissipate within a few days."
A review from BabySavers says, "The smell of the new mattress really wasn't noticeable as I was getting it set up, but it was there when I put my face against it, and it was still there when I went to bed that night. The off-gassing from the Nectar mattress did go away, though! It took about 3 days, and it was only apparent when laying right on it."
— reviewed Nectar Sleep on November 13, 2018, Read all 2 low-odor mattresses reviews.
The Sleep Judge's review said there was a noticeable smell at first, saying, "Off-gassing stuck around for about three days following unboxing. If you have a sensitive nose, you may want to give it a few days to air out. However, using my fitted sheet, I really couldn’t pick up the smell much past the first night."
The Tuck.com review rated their off-gassing properties as Good (below Very Good and Excellent) for all models and said, "Some off-gassing is to be expected from hybrids with latex and/or foam layers, but Brentwood Home mattresses produce a minimal amount of odor that usually clears up in a few days."
— reviewed Brentwood Home on November 13, 2018, Read all 2 low-odor mattresses reviews.
Tuck.com's review rated their off gassing properties as Good (below Very Good and Excellent) and said, "Customers rarely complain of off-gassing issues. In our examination, we noticed slight off-gassing that dissipated after 24 hours."
Our Sleep Guide's review goes into more detail about why you might notice a smell at first:
"During the unboxing process, you may notice some off-gassing but it should hopefully be fairly minimal. With most boxed mattresses there will be a little bit of smell initially. Also, it is important to note that this is NOT a USA made product. This mattress is made overseas and shipped to the US.
This may affect the off-gassing and odor since the mattress is rolled up in plastic and sitting in a box much longer than many of its USA made counterparts. This may also affect how long it takes to fully expand too. Once it is allowed to unroll and take shape it should dissipate. The mattress should be fine within several hours, but if you are more sensitive to certain smells letting it breath at least 24 hours would probably be a good idea."
— reviewed DreamCloud on November 13, 2018, Read all 2 low-odor mattresses reviews.
Mattress Junkie said a strong smell was not noticeable for Rem-Fit mattresses, saying, "Like new cars, mattresses often have a smell when they are unrolled. This smell is called off-gassing. The smell is usually very faint and quickly dissipates once the mattress breathes. The REM-Fit Sleep 200 Mattress didn’t have a noticeable smell."
The Memory Foam Talk review said, "The REM-Fit Sleep 400 had a moderate amount of off-gassing when taken out of the box and packaging, which is normal given the all foam construction which commonly has a degree of odor when taken out of the packaging.
The odor dissipated within a night and was nothing out of the ordinary compared to many similarly constructed mattresses.
— reviewed Rem-Fit on November 13, 2018, Read all 2 low-odor mattresses reviews.
Casper's website says this about a possible smell:
"Any new product can have a mild scent upon unboxing. Should your Casper mattress have a scent, it will dissipate in a few hours in a well-ventilated room. Though our water-based adhesive is more expensive, it eliminates unnecessary chemicals in your bed, which was a very important factor in our design process."
Tuck.com's review rated Casper as Fair (below Good, Very Good, and Excellent) for Off-gassing and said, "Some Casper owners report moderate off-gassing when the mattress is new."
Sleep Like the Dead's review said, "About 8% of Casper owners (1 in 13) report an enduring unpleasant initial odor – a rate somewhat higher than that of most competitors." They rated Casper's various mattresses a C or C-.
— reviewed Casper on November 13, 2018, Read all 2 low-odor mattresses reviews.
Sleep Like the Dead's review gives Leesa a grade of D+ for "No Initial Odor" saying, "At least 10% of Leesa model owners (1 in 10) report an enduring and unpleasant initial off gassing odor."
The Sleep Help Institute's revierevieww says, "Offgassing: The Leesa bed does present an initial off gassing odor due to its foam construction, but it should go away within a few days to a few weeks at most."
Mattress Guide's review also noted a smell with Leesa's mattresses saying, "When you first take your Leesa out of its packaging, there is a distinct “new mattress” smell, and some slight off-gassing. However, it typically disappears in a short span of time. The Leesa is eco-friendly and Certi-PUR certified as well.
Our research did, however, reveal that 11% of consumers reported issues with an unpleasant odor and off-gassing but overall, the odor is minimal."
— reviewed Leesa on November 13, 2018, Read all 2 low-odor mattresses reviews.
Nest Maven's review noted a smell that lingered in some cases, saying, "All memory foam mattresses have a distinct smell to them when first unwrapped, and Lucid mattresses are no exception to this rule. Always allow your new mattress a minimum of 3-days to air out in a well ventilated area before sleeping on it. Some owners of Lucid mattresses did comment that it took longer than they expected for the scent to dissipate — with a few reviewers stating that they could still smell it a month later."
Tuck.com's review of Lucid Mattress mattresses rated their off-gassing factor between Fair and Good (for different mattress types) and said, "Owners of Lucid memory foam mattresses report more smells than those who own latex or hybrid models."
— reviewed Lucid Mattress on November 14, 2018, Read all 2 low-odor mattresses reviews.
The Handson Mattress review noted a strong smell, saying, "There is an initial pungent smell when you first use the mattress due to off-gassing, but you can give it several hours to disperse and dissipate before you can finally use your bed."
— reviewed Olee Sleep on November 13, 2018, Read all 2 low-odor mattresses reviews.