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King Koil
King Koil Natural
Eco-focused natural-materials hybrid with strong pressure relief
Warranty
10 years
Trial Period
120 nights
Shipping
Free shipping through most dealers
Height
13 inches
Our Verdict
The Natural collection is King Koil's answer to the organic hybrid category: natural fibers in the cover and quilt, plant-derived and natural latex comfort layers, and a pocketed coil core. It sleeps a hair softer and quieter than PureBliss with similar breathability, and it is the model to look at if the eco angle matters as much as the feel. Pressure relief is strong at the shoulder and hip, and motion transfer is lower than a straight latex build because of the foam blending layer above the coils.
Ratings Breakdown
How we score (1–10 rubric) →Lab measurements: in the queue
The King Koil Natural has been slept on and scored by our testers, but it has not yet gone through the full instrumented protocol — pressure mapping, thermal imaging, motion transfer and edge-deflection loading. Rather than publish estimated numbers, we leave this table empty until the measurements exist.
Firmness Level
Medium (6/10)
What We Love
- Natural fibers and latex rather than all petroleum-based foam
- Very good breathability — wool and cotton help wick moisture
- Strong pressure relief without a sinking feel
- Quieter and lower motion transfer than a pure latex hybrid
What Could Be Better
- Costs more than the equivalent all-foam King Koil models
- Certifications vary by component — check the spec sheet if full organic matters
- Heavy to rotate
- No firm option beyond medium-firm
Best For
- Eco-conscious shoppers
- Side and back sleepers
- Hot sleepers
- Allergy-sensitive sleepers
Not Ideal For
- Bargain hunters
- Stomach sleepers wanting a firm 8/10
- Anyone needing a boxed bed shipped fast
Mattress Construction
Natural Fiber Cover
Cotton and wool blend quilt that wicks moisture and adds a natural flame barrier
Natural Latex Comfort Layer
Breathable latex that cushions the shoulder and hip without deep sink
Plant-Based Transition Foam
Partly plant-derived foam that blends the surface into the coil unit and damps motion
Pocketed Coil Core
Individually wrapped coils that keep the spine level and support heavier sleepers
Edge Support Frame
Reinforced perimeter coils for a usable sitting edge
Sleep Position Analysis
Side Sleepers
At 6/10 firmness, the King Koil Natural works well for average-weight side sleepers (130-230 lbs). Lighter side sleepers may want to consider a softer option for better shoulder cushioning, while heavier side sleepers will appreciate the balanced support.
Back Sleepers
Back sleepers will find the King Koil Natural's 6/10 firmness ideal for maintaining proper spinal alignment. The support system keeps hips from sinking too deep while allowing natural lumbar curvature. Our back-sleeping testers rated this 8.6/10 for support.
Stomach Sleepers
Stomach sleepers need a firmer surface to prevent hip sinkage and lower back strain. At 6/10, the King Koil Natural provides the flat, supportive surface stomach sleepers need. Our testers confirmed minimal hip depression during prone sleeping.
Combination Sleepers
The King Koil Natural's natural hybrid construction provides responsive support that adapts as you change positions throughout the night. The coil system provides bounce that makes repositioning effortless. Combination sleepers rated this highly in our testing.
What People Cross-Shop Against the King Koil Natural
The five beds closest to the King Koil Natural on price, firmness and build in our lab data — and the one thing each does differently. Scores are out of 10 on our published rubric.
Stearns & Foster Estate has stronger edges (9.5 vs 8.3).
Purple Restore Hybrid sleeps cooler (9.4 vs 8.8).
Beautyrest Black has stronger edges (9.4 vs 8.3).
Eight Sleep Pod 3 sleeps cooler (9.9 vs 8.8).
PlushBeds Botanical Bliss is better value for money (8.7 vs 8.0).
Want a different pairing? Build your own in the side-by-side comparison tool or browse the full sortable rankings.
King Koil Natural Price Tracker: When It's Cheapest
Queen pricing. List price $3,099, currently advertised at $2,349 (24% off).
Worth waiting if you can. The King Koil Natural typically drops to around $1,860–$2,325 around Labor Day (Late August – early September), roughly $489 below today's price. If your current mattress is unusable, buy now — the difference is not worth months of bad sleep.
| Sale event | Window | Typical off list | Estimated queen price | Notes |
|---|---|---|---|---|
| Presidents' Day | Mid-February | 20–35% | $2,015–$2,480 | First real sale of the year. Good depth, thin inventory on new models. |
| Memorial Day | Late May | 25–40% | $1,860–$2,325 | One of the two deepest events of the year and the best spring window. |
| Fourth of July | Late June – July 4 | 20–35% | $2,015–$2,480 | Similar depth to Presidents' Day, usually with better bedding bundles. |
| Labor Day | Late August – early September | 25–40% | $1,860–$2,325 | Model-year clearance. Best time to buy last season's flagship. |
| Black Friday | Mid-late November | 30–45% | $1,705–$2,170 | Deepest discounts of the year on most brands, plus the best free-bundle value. |
| Cyber Monday | Monday after Thanksgiving | 30–45% | $1,705–$2,170 | Usually identical pricing to Black Friday; occasionally $50–100 deeper online. |
How to read this: the list and current prices are the King Koil advertised figures at our last check. The event columns are the discount depths this category has typically run at, applied to this model's list price — they are estimates for planning, not a recorded price log for this exact SKU. Always confirm the live price before buying. See our best time to buy a mattress guide and current mattress deals.
Frequently Asked Questions
Customer Reviews
Exactly what we wanted materials-wise
We were replacing a ten year old foam bed and wanted less synthetic material in the bedroom. This checked the boxes and the feel is great — soft on top, supportive underneath.
Comfortable, pricey
Sleeps cool and I like the wool quilt. Value is fine but not exceptional compared to the PureBliss which is $600 less.
Good for allergies
My morning congestion improved after switching. Hard to prove but the wool and cotton probably help.
Quick Specs
- Type
- Natural Hybrid
- Firmness
- Medium
- Height
- 13 inches
- Trial
- 120 nights
- Warranty
- 10 years
How We Tested the King Koil Natural
Every mattress we review goes through our rigorous, multi-step evaluation process. Here's exactly how we arrived at our scores for the King Koil King Koil Natural.
Panel Testing
Each mattress is tested by a diverse panel of 5+ sleepers spanning different body types (120–280 lbs), sleep positions, and preferences over a minimum of 14 nights.
Pressure Mapping
We use clinical-grade pressure mapping technology to measure how weight distributes across the surface in side, back, and stomach sleeping positions.
Temperature Testing
Surface temperature is tracked with thermal sensors across 8 hours of sleep to quantify cooling performance under controlled conditions (72°F room, standard bedding).
Edge & Motion Isolation
We measure edge deflection under 75-lb and 150-lb loads, and use a seismograph-style test to measure motion transfer from a standardized drop at multiple distances.
Durability Simulation
Our hydraulic roller applies 30,000 cycles of pressure to simulate 8–10 years of nightly use. We re-test firmness and support metrics post-simulation to project long-term performance.
Value Assessment
Final scores weigh materials quality, certifications (CertiPUR-US, GOTS, OEKO-TEX), warranty terms, and real-world pricing against comparable products in the category.
Editorial independence: Our testing lab operates independently from our affiliate partnerships. Brands cannot pay for higher scores or influence our methodology. Read our full editorial policy and detailed testing methodology.
Owner Reviews
Real opinions from King Koil Natural owners. 0 reviews
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More on King Koil and its closest rivals
Brand-level context for this review: King Koil's construction philosophy, pricing bands, trial and warranty terms, plus the competitors we cross-shopped it against.
- King Koil review & brand guideA century-old licensed manufacturer known for chiropractic-endorsed innersprings.Queen $449–$2,199 · Varies by retailer, commonly 90–120 nights
- Serta review & brand guideAmerica's highest-volume mattress brand, sold in nearly every furniture store.Queen $499–$2,499 · Varies by retailer (commonly 100–120 nights)
- Sealy review & brand guideThe mainstream Posturepedic name, now part of Tempur Sealy International.Queen $499–$2,299 · Varies by retailer (commonly 100 nights)
- Restonic review & brand guideLicensee co-operative building regional mattresses since 1938.Queen $599–$2,199 · Set by the retailer
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