3 Best Wyoming King Mattresses in 2026
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For sleepers who need a true 84×84 square mattress, the Triad Colossal 84×84 Mattress is the best overall Wyoming king. Its three-piece design simplifies setup in tight spaces, while graphite memory foam delivers targeted pressure relief. The Mattress Insider Wyoming King Mattress earns our Best Organic Cotton Cover award, and the Triad Majestic 84×84 Mattress takes Best Natural Latex for those seeking a medium-feel, eco-friendly core.
A Wyoming king is a specialty size, 84 inches square, that fits custom-built frames or oversized platform beds. Standard king sheets won’t fit, and most mattress brands skip this dimension entirely, so finding a bed that matches your frame without sagging or overhang is the real challenge. Comfort preferences and material priorities narrow the field further.
We evaluated the few available Wyoming king models by comparing construction, material quality, and owner feedback patterns across bedding forums and manufacturer documentation. This guide focuses on three distinct builds, a cooling memory-foam option, an organic-cotton hybrid, and a natural latex bed, so you can match the right mattress to your sleep style and frame.
Top 3 Wyoming King Mattresses in the Market
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The Best Wyoming King Mattresses, Reviewed
Triad Colossal 84×84 Mattress
What We Like
- Square 84×84 Wyoming King size
- Graphite memory foam for pressure relief
- 3-piece design simplifies setup
- Cooling gel foam in quilted Tencel cover
Trade-offs
- At 150 lb, moving it requires help
- At 150 pounds, the mattress is heavy to move.
A true 84-by-84-inch square mattress means you get the full Wyoming King footprint without rounding off corners or losing usable sleeping surface. The 12-inch profile combines a three-inch layer of graphite memory foam with a gel-foam quilted Tencel cover, which aims to keep the plush feel from turning into a heat trap. For anyone who wants a spacious, even sleeping area and prefers a medium-to-plush comfort level, this design puts the emphasis on pressure relief and easy assembly thanks to its three-piece construction.
At 150 pounds, this mattress is a substantial piece to move, though the three-piece construction makes it manageable to get into a bedroom. The graphite memory foam offers medium-to-plush comfort, which feels different from the natural latex in the Triad Majestic 84×84. For someone who wants a plush feel with cooling features, this model fits the bill, while the Majestic appeals to those who prefer a different type of support.
Product photos
Mattress Insider Wyoming King Mattress
What We Like
- 100% organic cotton quilted cover
- Flippable and removable comfort layers
- Encased coils reduce motion transfer
- 13.5-inch profile for substantial feel
Trade-offs
- At 3.3 pounds, weight seems improbable for a mattress this size
- No natural latex option for those avoiding synthetic foams
A 100% organic cotton quilted cover is the feature that stands out most here, giving sleepers a breathable, naturally sourced surface that feels soft against the skin without synthetic treatments. That makes this Wyoming king a strong option for anyone who prioritizes natural fibers in their bedding, especially couples or families who want the generous 84-inch square footprint without compromising on cover material. The flippable and removable comfort layers add flexibility, letting you adjust firmness over time rather than being stuck with one feel from day one.
The trade-off is that at a listed weight of 3.3 pounds, this mattress is unusually light compared to the Triad Majestic’s 150-pound build. If you prefer a heavier mattress with a natural latex core, the Majestic offers that weight and material. But if organic cotton on the surface and adjustable layers matter more, this Insider model gives you those priorities at a profile that sits an inch and a half taller than the Triad options.
Triad Majestic 84×84 Mattress
What We Like
- Natural organic latex core
- Cotton blend cover
- Medium feel for balanced support
- Cooling and pressure relieving
Trade-offs
- 150 pounds makes repositioning difficult
- No edge support for sitting on side
A 84×84-inch square footprint is the whole point of a Wyoming king, and the Triad Majestic delivers the full 84-inch width and length without cutting corners. The natural organic latex core gives it a responsive, medium feel that supports most sleep positions without sinking too deep, while the cotton blend cover breathes better than synthetic alternatives. This is a mattress for someone who wants a square bed that stays cool and doesn’t rely on memory foam or springs to do the job.
The trade-off is weight: at 150 pounds, moving this mattress for sheet changes or room rearrangements is a two-person job. Compared to the Triad Colossal, which uses graphite memory foam for a plush feel, the Majestic’s latex is firmer and more resilient, better for stomach and back sleepers who need pushback. If you need a softer, sink-in surface, the Colossal is the better fit; if you prefer natural materials with a medium, supportive feel, this is the one.
Product photos
How We Evaluated Wyoming King Mattresses
Our research began with the short list of manufacturers who actually produce a true 84×84 Wyoming king, most “split king” or “Alaska king” beds are different dimensions. We reviewed each model’s spec sheet, including layer composition, coil gauge, foam density, and cover fabric. We also examined construction methods like encased coil systems and flippable comfort layers, which affect durability and longevity.
The three criteria that mattered most were size accuracy, material quality, and weight management. An off-size mattress wastes the investment in a custom frame. Material quality determines comfort and lifespan, especially for a bed this large. Weight matters because a Wyoming king is substantial, the Triad models weigh 150 pounds, so delivery and setup logistics are a real consideration for buyers.
We prioritize consistent patterns across multiple sources, forum threads, verified buyer reviews on retailer sites, and manufacturer return-rate data, over isolated complaints. The result is a practical guide for a narrow but important category.
What To Look For In Wyoming King Mattresses
A Wyoming king mattress must fit an 84×84 frame exactly, support your preferred sleep position, and be manageable to move into your home. Here is what to check before buying.
Focus on exact dimensions, material layers, and delivery logistics. An inch off means a bad fit, and 150 pounds of mattress is not easy to reposition alone.
Exact 84×84 Dimensions
A true Wyoming king measures 84 inches wide by 84 inches long, a perfect square. Some brands label other sizes as Wyoming king, which will not fit your frame. Verify the spec sheet lists 84×84 before ordering. If you are comparing sizes, our guide explains how the square shape differs from standard beds.
Material Composition and Comfort Layer
The top layers determine feel. Graphite-infused memory foam (as in the Triad Colossal) offers plush pressure relief with cooling properties. A natural latex core (Triad Majestic) provides medium support with more bounce and breathability. Hybrid builds with encased coils (Mattress Insider) reduce motion transfer and add airflow. Shoppers who want a natural surface should look for an organic cotton cover, the Mattress Insider uses 100% organic cotton in its quilted cover.
Weight and Setup Logistics
A Wyoming king mattress typically weighs 150 pounds, which means you will need help moving it. The Triad Colossal solves this with a three-piece design, each section is manageable for two people. The Triad Majestic and Mattress Insider are single-piece mattresses that require more planning for stairs and doorways. Check your delivery route before buying. For frame compatibility, our custom mattress options resource covers sizing considerations for non-standard beds.
- Measure your frame’s interior width and length to confirm 84×84.
- Check whether the mattress ships in sections or as one piece.
- Confirm return and exchange policies, specialty sizes often have shorter trial windows.
- Look for a removable, washable cover if you want to extend the mattress’s lifespan.
- Verify that standard Wyoming king sheets are available before you buy, some brands sell matching bedding separately.
A Wyoming king is a long-term purchase; prioritize material quality and size accuracy over price.
Wyoming King Mattresses Compared
The table below compares the three Wyoming king mattresses across key specs, size, construction, weight, and comfort features, so you can see the differences at a glance.
| Product | Thickness | Weight | Construction | Cover Material |
|---|---|---|---|---|
| Triad Colossal 84×84 Mattress | 12 inches | 150 pounds | 3-piece foam | Tencel fabric with gel foam quilting |
| Mattress Insider Wyoming King Mattress | 13.5 inches | N/A | Encased coils | 100% organic cotton quilted |
| Triad Majestic 84×84 Mattress | 12 inches | 150 pounds | Latex Foam | Cotton Blend |
Frequently Asked Questions
What size is a Wyoming king mattress?
A Wyoming king measures 84 inches wide by 84 inches long, a perfect square. It is larger than a standard king and fits custom-built frames designed for this specific dimension.
Is a Wyoming king the same as an Alaska king?
No. An Alaska king is longer than it is wide, a rectangle, while a Wyoming king is 84 inches square. The two sizes are not interchangeable, and bedding for one will not fit the other.
What sheets fit a Wyoming king mattress?
Wyoming king sheets are sold separately and are not the same as standard king or California king sheets. Some mattress brands offer matching sheet sets, and specialty bedding retailers also carry this size. Our king bedding guide includes tips for finding sheets for square king dimensions.
Can I use a mattress topper on a Wyoming king?
Yes, but you need a topper cut to 84×84 inches. Standard king toppers will leave a gap. Some brands offer custom sizing, and our king mattress toppers resource covers how to measure and order the right fit.
How heavy is a Wyoming king mattress?
Most Wyoming king mattresses weigh around 150 pounds. The Triad Colossal splits into three sections to make setup easier, while single-piece models like the Triad Majestic require at least two people to move. Plan your delivery route and have help ready.
The Bottom Line
The Triad Colossal 84×84 Mattress is the best overall Wyoming king for most shoppers. Its three-piece design solves the weight problem, and the graphite memory foam offers plush pressure relief with cooling. If you prefer a natural feel, the Triad Majestic 84×84 Mattress delivers a medium latex core and cotton cover for balanced support.
Budget-conscious buyers and those who prioritize fabric purity should consider the Mattress Insider Wyoming King Mattress. Its 100% organic cotton quilted cover and flippable comfort layers give you adjustability and a soft surface without synthetic top foams.
The single most important factor when buying a Wyoming king is verifying the exact 84×84 dimensions, an inch off means a bad fit for your custom frame. Measure twice, then choose the material and setup that match your sleep style and home layout.
