Evergreen 12" Medium-firm Organic Latex Foam Mattress Performance & Feel - Full Comfort Analysis
Overview: The Evergreen 12" Medium-firm Organic Latex Foam Mattress is a premium Canadian-made organic all-foam mattress from Evergreen's ecoRest™ collection (est. 2015), featuring an Organic Cotton Quilted Fabric cover, 4 inches of Organic Pocketed Latex, a 1-inch Organic Latex Support Panel, and a 7-inch Open Cell Bio Foam Core. This exceptional mattress carries multiple certifications including GOLS (Global Organic Latex Standard - Certified 100% Natural), Eco-Institute (No Fillers or Hazardous Particles), Oeko-Tex Standard 100 (No Harmful Substances), and ABC Research Laboratories (Certified Antimicrobial). It achieves perfect 10.0 scores in four categories: cooling, motion isolation, responsiveness, and durability. With a medium-firm feel (5/10) and moderate sinkage (2.19 inches) creating a balanced cradle with noticeable contour, this is the ideal mattress for eco-conscious sleepers seeking certified organic materials with exceptional cooling at just 23.2°C (73.8°F) settling temperature - among the coolest in the entire mattress lineup.
Realistic Expectations
These scores reflect realistic expectations based on construction, materials, and verified owner feedback. Your results will vary by body type, base, and room temperature.
Quick Specs
| Spec | Details |
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| Mattress Type | Organic All-Foam Latex (Medium-Firm with Pocketed Latex + Bio Foam Core) |
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| Firmness | 5/10 (Medium-Firm) |
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| Mattress Height | 12 in (30.48 cm) |
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| Comfort Layer Thickness | 5 in (12.70 cm) - 4" Organic Pocketed Latex + 1" Organic Latex Support Panel |
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| Queen Price | $1,167 |
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| Fiberglass-Free | Yes |
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| Ships in a Box | Yes |
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| Certifications | GOLS (100% Natural), Eco-Institute, Oeko-Tex Standard 100, ABC Antimicrobial, CertiPUR-US® |
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Comfort IQ™ Scores are derived from published specifications, materials, and construction details to help compare mattresses consistently.
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Best For
- Eco-conscious sleepers seeking certified organic materials, as this mattress carries GOLS certification (100% Natural organic latex), Eco-Institute certification (no fillers or hazardous particles), Oeko-Tex Standard 100 (no harmful substances), and ABC Research Laboratories antimicrobial certification - among the most comprehensively certified organic mattresses available.
- Hot sleepers seeking exceptional cooling at a premium organic tier, as the organic cotton quilted surface and breathable latex foam achieve an exceptional settling temperature of just 23.2°C (73.8°F) - one of the coolest-sleeping mattresses in the entire lineup regardless of price or construction type.
- Sleepers who want responsive support without the "stuck" feeling of memory foam, as the 5 inches of organic latex provide immediate pushback and buoyant support with perfect 10.0 responsiveness - latex provides conforming comfort while feeling lively rather than slow-to-recover.
Considerations
- Edge support (6.8) is fair without reinforcement; sleepers who sit on the edge frequently or need to use the full surface area should expect some compression near the perimeter - this is typical for all-foam latex construction without coil or foam encasement.
- At $1,167 for a Queen, this is a premium investment; budget-conscious shoppers should weigh the organic certifications and latex durability against less expensive hybrid options that may offer similar performance.
- Latex has a distinctive "bouncy" feel that differs from memory foam; sleepers who prefer the slow-conforming, hugging sensation of memory foam may find latex too responsive and buoyant for their preference.
Feel & Firmness
At 5/10 on the firmness scale (medium-firm, accurate and comparable to other medium-firm mattresses), the Evergreen 12" Medium-firm Organic Latex Foam Mattress delivers a balanced sleep experience with buoyant, responsive comfort. With 2.19 inches (5.56 cm) of sinkage - moderate - you will experience a balanced cradle with noticeable contour and gentle cushioning. The Organic Cotton Quilted Fabric cover provides a soft, breathable, natural sleep surface. The 4-inch Organic Pocketed Latex provides responsive, conforming comfort with targeted give from the pocketed construction. The 1-inch Organic Latex Support Panel adds additional buoyant support. The 7-inch Open Cell Bio Foam Core (1.8 lb/ft³ density) provides stable, consistent support with excellent airflow from the open cell construction.
The responsiveness score of 10.0 reflects the quick-rebound, lively feel characteristic of natural latex. Latex adds immediate pushback that makes changing positions feel easy. You won't experience the slow-recovery "stuck in the mattress" feeling common with memory foam - instead, the latex feels buoyant and alive, helping you move freely throughout the night.
Cooling
This mattress earns a perfect 10.0 cooling score - exceptional for any mattress type and remarkable for an all-foam construction. The Organic Cotton Quilted surface provides natural breathability and moisture-wicking. The Organic Pocketed Latex is naturally breathable with an open cell structure that promotes airflow. The Open Cell Bio Foam Core features open cell construction that allows air to circulate freely. In temperature observations, the mattress showed a baseline of 22.0°C (71.6°F), a maximum of 28.7°C (83.7°F), and settled at just 23.2°C (73.8°F). This is among the coolest-sleeping mattresses available - organic latex and cotton naturally regulate temperature far better than synthetic memory foams.
Motion Isolation
Scoring a perfect 10.0 for motion isolation, this organic latex mattress excels at minimizing sleep disturbances. The continuous latex and foam layers help keep movement more localized than a spring network. The thick foam stack (5 inches of latex over 7 inches of bio foam) adds extra damping for partner movement. Couples will appreciate that getting in and out of bed causes minimal disturbance to the other sleeper - impressive given the responsive, bouncy nature of latex.
Edge Support
With a 6.8 edge support score, this mattress has fair perimeter stability - typical for all-foam construction without edge reinforcement. The resilient latex core helps keep support more consistent toward the edges for sleeping closer to the side. Maximum edge sinkage was measured at 4.42 inches (11.23 cm) with good lying support. Sleepers who frequently sit on the edge or need to use the full sleep surface should expect some compression near the perimeter, though the latex resilience helps maintain reasonable support.
Pressure Relief
The Evergreen 12" Medium-firm Organic Latex Foam Mattress earns an excellent 9.3 pressure relief score. The latex comfort layers with layered natural latex construction create a balanced cradle at the shoulders and hips. The pocketed latex design adds targeted give at pressure points similar to pocketed coils. The medium-firm feel balances contouring and lift for most sleepers - you get enough cushioning at pressure points while maintaining overall support and the buoyant feel latex is known for.
Off-Gassing
As an organic latex mattress with multiple certifications (CertiPUR-US®, Eco-Institute - no fillers or hazardous particles, Oeko-Tex Standard 100 - no harmful substances), this mattress may have a low initial odour upon delivery that typically dissipates within 2 days based on reported experience. Natural latex has a distinctive mild scent that clears quickly. The extensive certifications ensure no harmful off-gassing chemicals.
For best results, allow the mattress to air out in a well-ventilated room for several hours after delivery. The natural materials may have a mild characteristic scent that is not harmful and dissipates quickly.
Construction & Materials
The Evergreen 12" Medium-firm Organic Latex Foam Mattress is a Canadian-made premium organic all-foam latex mattress from Evergreen's ecoRest™ collection (est. 2015), a Canadian organic-latex focused brand with chiropractor-oriented ergonomics and natural/organic materials positioning. This mattress carries extensive certifications: GOLS (Global Organic Latex Standard - Certified 100% Natural), Eco-Institute (No Fillers or Hazardous Particles), Oeko-Tex Standard 100 (No Harmful Substances), ABC Research Laboratories (Certified Antimicrobial), and CertiPUR-US® certified foams. The Organic Cotton Quilted Fabric provides a natural, breathable cover. The comfort system includes 4 inches of Organic Pocketed Latex for responsive, conforming comfort and 1 inch of Organic Latex Support Panel for additional buoyant support. The support core consists of a 7-inch Open Cell Bio Foam Core (1.8 lb/ft³ density). This premium organic construction is backed by a 10-year warranty.
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| Layer (Top → Bottom) |
Material |
Thickness |
Notes |
| 1 | Organic Cotton Quilted Fabric | Cover | Natural, breathable |
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| 2 | Organic Pocketed Latex | 4 in (10.16 cm) | GOLS certified, responsive comfort |
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| 3 | Organic Latex Support Panel | 1 in (2.54 cm) | GOLS certified, buoyant support |
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| 4 | Open Cell Bio Foam Core | 7 in (17.78 cm) | 1.8 lb/ft³, CertiPUR-US |
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Sleep Position & Body Weight Fit
The medium-firm feel (5/10) with moderate sinkage makes this mattress versatile for multiple sleep positions. Back sleepers will find excellent support as the supportive latex core provides buoyant, even lift for neutral alignment with reinforced edge support helping the surface stay level near the sides. Side sleepers will find excellent pressure relief from the latex comfort layers creating a balanced cradle at the shoulders and hips. Stomach sleepers will appreciate the medium-firm support that helps keep the pelvis level while the latex's buoyant nature prevents excessive sinking. Combination sleepers will love the responsive latex that makes repositioning effortless.
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| Sleeper Weight |
Side Sleepers |
Back Sleepers |
Stomach Sleepers |
| Under 150 lb | Excellent | Excellent | Good |
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| 150-250 lb | Excellent | Excellent | Good |
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| 250-300 lb | Good | Good | Fair |
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| 300+ lb | Fair | Fair | Fair |
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Policies & What To Know
Related shopping help:
Shop all Evergreen mattresses
Shop all Latex mattresses
Shop Medium mattresses
FAQs
Is the Evergreen 12" Medium-firm Organic Latex good for hot sleepers?
Yes, this mattress is exceptional for hot sleepers, scoring a perfect 10.0 for cooling. The Organic Cotton Quilted surface provides natural breathability and moisture-wicking. The Organic Pocketed Latex is naturally breathable with an open cell structure. The Open Cell Bio Foam Core allows air to circulate freely. Temperature observations showed the mattress settling at just 23.2°C (73.8°F), which is among the coolest-sleeping mattresses available at any price - natural latex and cotton regulate temperature far better than synthetic memory foams.
Does the Evergreen 12" Medium-firm Organic Latex feel like you sink in or stay on top?
You will experience a balanced cradle with noticeable contour and gentle cushioning. With 2.19 inches (5.56 cm) of sinkage - moderate - this mattress creates comfortable conforming without excessive sinking. Latex has a distinctive buoyant quality that provides support while still allowing your body to settle into the mattress. Unlike memory foam which slowly conforms, latex pushes back immediately, creating a lively, supported feel rather than a deep-sinking hug.
Is it a good choice for couples?
This mattress is very good for couples, earning an 8.9 Couples/Intimacy score. It achieves perfect 10.0 scores in motion isolation (latex and foam layers keep movement localized) and bounce (latex provides excellent responsiveness). The main trade-off is edge support (6.8) which is fair without reinforcement - couples who need to use the full sleep surface should be aware of potential compression near the perimeter. Overall, the combination of excellent motion isolation with lively bounce makes it well-suited for couples.
What sleep positions is it best for?
The Evergreen 12" Medium-firm Organic Latex is versatile for multiple sleep positions. Back sleepers will find excellent support with buoyant, even lift for neutral alignment. Side sleepers will find excellent pressure relief from the latex comfort layers. Stomach sleepers will appreciate the medium-firm support that helps keep the pelvis level. Combination sleepers will love the responsive latex that makes repositioning effortless throughout the night.
How long does off-gassing usually last?
Based on owner feedback and the extensive certifications (CertiPUR-US®, Eco-Institute, Oeko-Tex Standard 100), any initial odour is typically low and dissipates within 2 days. Natural latex has a mild characteristic scent (some describe it as slightly sweet or rubbery) that is not harmful and clears quickly. The multiple certifications ensure no harmful off-gassing chemicals. Allow the mattress to air out in a well-ventilated room after delivery.
What do all the organic certifications mean?
This mattress carries multiple certifications that verify its organic and safety claims:
GOLS (Global Organic Latex Standard):
• Certifies the latex is 100% natural organic latex
• Verifies organic farming practices for rubber tree plantations
• Ensures no synthetic latex or petroleum-based fillers
• Audits the entire supply chain from farm to finished product
Eco-Institute:
• Independent German testing laboratory
• Certifies no fillers or hazardous particles
• Tests for emissions and harmful substances
• Stringent standards for indoor air quality
Oeko-Tex Standard 100:
• Certifies no harmful substances
• Tests for over 100 potentially harmful chemicals
• Ensures product is safe for human contact
• Internationally recognized textile safety standard
ABC Research Laboratories - Antimicrobial:
• Certifies natural antimicrobial properties
• Tests resistance to bacteria and microbes
• Natural latex has inherent antimicrobial properties
CertiPUR-US®:
• Certifies the Bio Foam Core meets foam quality standards
• Low VOC emissions for indoor air quality
• No ozone depleters, heavy metals, or prohibited phthalates
Together, these certifications make this one of the most comprehensively certified organic mattresses available.
How does latex compare to memory foam?
Latex and memory foam offer different sleeping experiences:
Latex (this mattress):
• Immediately responsive - pushes back instantly
• Buoyant, lively feel - easy to move and reposition
• Naturally cool - excellent breathability
• Durable - maintains properties for 15-20+ years
• Natural/organic options available (GOLS certified)
• Moderate conforming - cradles without deep sinking
Memory Foam:
• Slow response - conforms gradually to body heat and pressure
• Hugging, enveloping feel - can feel "stuck" to some
• Can sleep warm - retains heat (though gel options help)
• Good durability - typically 7-10 years
• Synthetic materials (petroleum-based)
• Deep conforming - creates body impression
Who prefers latex:
• Hot sleepers wanting exceptional cooling
• Combination sleepers who change positions
• Eco-conscious shoppers wanting organic materials
• Those who dislike the "stuck in the mattress" feeling
Who prefers memory foam:
• Those seeking maximum pressure relief through deep conforming
• Sleepers who enjoy the hugging, enveloping sensation
• Budget-conscious shoppers (memory foam often costs less)
