Sweetnight CoolNest vs Purple: Which Mattress Wins 2026?

Two mattresses aimed at hot sleepers, two very different builds. The SweetNight CoolNest is an all-foam mattress built around a layered cooling system, sold in three thicknesses, while the Purple Mattress pairs a 2-inch GelFlex Grid with comfort foam in a single 9.25-inch profile. One is a foam mattress you choose by thickness, the other is a grid-topped medium-firm design with a single spec sheet. Skip both if you want an innerspring build with selectable firmness; compare the Saatva Classic instead. This face-to-face lays out what each one actually offers so you can pick with confidence.

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Which mattress should you buy, SweetNight CoolNest or Purple?

The SweetNight CoolNest is the pick for hot sleepers who want an all-foam feel and the freedom to choose thickness, with a Full Queen listed at $349.99 against a comparable value of $599.99. The Purple Mattress is the pick if you want a single medium-firm design that eases pressure at the hips and shoulders and suits stomach, back, side and combination sleepers. Both carry a 100-night trial and a 10-year warranty, so the trial terms do not separate them.

The real split is construction. SweetNight builds the CoolNest as a layered foam stack: a 3D weaving CoolNest cover, PCMflux high-resilience foam, gel-infused memory foam, ocean memory foam, transition comfort foam and a 5-zone support foam with nine comfort bars. Purple builds the original around a 2-inch GelFlex Grid made of hyper-elastic polymer, sitting on 3.5 inches of polyurethane comfort foam and a 4-inch polyurethane base. One is a stack of foams tuned for cooling and zoning; the other is a grid that flexes over foam.

How do the two mattresses feel?

The CoolNest comes in three thicknesses, and the thickness you pick changes the feel: 12 inches labeled Essential Cooling, 14 inches labeled Enhanced Cooling, and 16 inches labeled Ultimate Cooling and Support. SweetNight describes the all-foam feel as body-cradling support and pressure relief, and lists side sleepers who need pressure-point contouring as the best fit. The 5-zone support design with nine comfort bars is what gives the mattress its full-body pressure relief claim.

The Purple Mattress has one feel: medium-firm with responsive support. Purple states it is designed to ease pains and relieves pressure at the hips, shoulders and joints, and that it is best for stomach, back, side and combination sleepers. The 2-inch GelFlex Grid is the top layer, so the surface feel is defined by that grid flexing over the comfort foam rather than by a stack of foam layers. At 9.25 inches tall, it is shorter than any CoolNest thickness.

What is each mattress made of?

The CoolNest layer list runs from the cover down: 3D weaving CoolNest cover, PCMflux high-resilience foam, gel-infused memory foam, ocean memory foam, transition comfort foam, and 5-zone support foam with nine comfort bars. SweetNight states that all its foam is CertiPUR-US certified and that the CoolNest fabric passes STANDARD 100 by OEKO-TEX. The mattress is offered in Twin, Full, Queen and King sizes with 12″, 14″ and 16″ thickness options.

The Purple Mattress build is stated plainly: a top layer of 2-inch Purple GelFlex Grid in hyper-elastic polymer with a non-toxic moisture-wicking treatment, a comfort layer of 3.5-inch polyurethane foam, and a base layer of 4-inch polyurethane foam. The fabric is a polyester and spandex top panel with a polyester and acrylic latex bottom panel, and the fire barrier is a fiberglass-free fire sock that is not chemically treated. Purple lists the queen at 60 by 80 by 9.25 inches and 88 pounds.

Which one is better for hot sleepers?

The CoolNest is built specifically for heat. SweetNight states the CoolNest system feels up to 8 degrees cooler, and the mattress combines the CoolNest cover with PCMflux high-resilience foam for all-night cooling and sweat-free sleep. The 3D airflow structure design is part of the build, and the three thicknesses are labeled by cooling level, with the 16-inch model carrying the Ultimate Cooling and Support label. If sleeping cool is your main reason for shopping, this is the side of the table that speaks directly to it.

Purple states that the mattress dissipates heat and relieves pressure, and the GelFlex Grid layer is what does that work. The grid structure leaves open space between the polymer columns, and the breathable stretch top panel flexes with it. Purple does not attach a temperature figure to the claim, so the two cooling stories are not measured the same way. For hot sleepers who also want a specific cooling number attached to the claim, the CoolNest states one.

How do trial, warranty and shipping compare?

Both mattresses carry a 100-night trial and a 10-year warranty, so these terms are a tie on paper. SweetNight labels its trial a 100-night trial and offers free U.S. shipping, with the CoolNest shown as in stock and shipping in 1 to 2 business days. Purple offers a 100-night trial, a 10-year warranty and a lowest price guarantee, and ships the mattress rolled from a U.S. warehouse with handles for carrying it to the room. Purple also notes that not all bed frames provide proper structural support for a Purple mattress, so check your frame before ordering.

What does each mattress cost?

The SweetNight CoolNest lists a Full Queen at $349.99, marked down from a comparable value of $599.99, a saving of $250.00. SweetNight also shows a monthly payment figure of $29.16 and notes the mattress is HSA/FSA eligible. The Purple Mattress price is not published here, so this page draws no value conclusion from price between the two. Check the current price on each brand’s own page before you commit, since sale pricing changes.

What you can compare without figures is what sits behind the price. The CoolNest gives you three thicknesses: 12″, 14″ and 16″, so you can match the build to how much cooling and support you want. The Purple Mattress gives you one build at one height, with the grid as the defining feature. One is a menu, the other is a single well-defined design.

Who should buy the SweetNight CoolNest?

Pick the CoolNest if you sleep hot and want a foam mattress where the cooling claim is stated as a number: up to 8 degrees cooler, with the cover and PCMflux foam working together for sweat-free sleep. It suits side sleepers who want pressure-point contouring, since SweetNight lists that sleep position as the best fit for the all-foam feel. It also suits anyone who wants to choose thickness rather than accept a single profile, with 12, 14 and 16 inch options labeled Essential, Enhanced and Ultimate cooling. And it suits budget-minded shoppers, with the Full Queen listed at $349.99 against a comparable value of $599.99. If you want a mattress that ships fast from stock with free U.S. shipping, this side also fits.

Who should buy the Purple Mattress?

Pick the Purple Mattress if you want one medium-firm design that Purple says works for stomach, back, side and combination sleepers, so you do not have to choose a firmness level. It suits sleepers who want pressure eased at the hips, shoulders and joints, which is the specific relief Purple names. It suits anyone who prefers a grid surface over a foam stack, since the 2-inch GelFlex Grid is the top layer and defines how the surface responds. It suits combination sleepers who change position at night and want a responsive surface rather than a body-cradling one. And it suits shoppers who want a single 9.25-inch profile that pairs with an adjustable base, which Purple states the mattress does. If you move house often, the rolled design with handles and the quick-ship warehouse delivery make it easy to get into the room.

Is one clearly better than the other?

Neither mattress wins on trial or warranty, since both carry 100 nights and 10 years. The CoolNest wins the cooling argument on stated terms, with an 8-degree figure and a three-thickness cooling ladder. The Purple Mattress wins the versatility argument, with one medium-firm feel that Purple says suits all four sleep positions. The CoolNest wins on published price, with a Full Queen at $349.99, while the Purple price is not published here. The Purple Mattress lists Twin, Twin XL, Full, Queen, King, California King and Split King, while the CoolNest lists Twin, Full, Queen, King and CLK.

The verdict depends on which of those axes matters most to you. If cooling is the reason you are shopping, the SweetNight CoolNest is the face-to-face winner: it is built for hot sleepers, states its cooling figure, and offers three thicknesses to match. If you want a single versatile feel that works across sleep positions with pressure relief at the major joints, the Purple Mattress is the better fit. Read the full reviews before deciding: our SweetNight CoolNest review and our Purple Mattress review go deeper on each one.

World Sleep Almanac score: 8.2/10

The World Sleep Almanac editorial score for this face-to-face is 8.2/10, judged on five criteria: price at equal size, trial and returns, warranty, materials and construction, and public customer reviews. Price at equal size scores well because the CoolNest publishes a Full Queen at $349.99 while the Purple price is not published here, which caps the comparison. Trial and returns score as a tie, with both brands offering 100 nights. Warranty also ties at 10 years for both. Materials and construction score highly, with CertiPUR-US certified foam and OEKO-TEX certified fabric on the CoolNest and a fiberglass-free fire sock plus a hyper-elastic polymer grid on the Purple. Public customer reviews favor Purple, which shows a 4.5 rating across 29,585 reviews, while no equivalent public figure appears for the CoolNest. The score is an editorial judgment built from these criteria, not a lab test.

Frequently asked questions

Is the SweetNight CoolNest cooler than the Purple Mattress?

SweetNight states the CoolNest system feels up to 8 degrees cooler and describes the cover and PCMflux foam as working together for sweat-free sleep. Purple states the mattress dissipates heat through the GelFlex Grid but attaches no temperature figure to that claim. The two claims are not measured the same way, so weigh the stated number against the grid’s open structure and decide which matters more to you.

Can I get the CoolNest and the Purple in the same size?

Both list Twin, Full, Queen and King. Purple additionally lists Twin XL, California King and Split King, while the CoolNest lists CLK. If you need California King or Split King, only the Purple side covers it. If you want the 12, 14 or 16 inch thickness choice, only the CoolNest offers it.

Do both mattresses come with the same trial and warranty?

Yes, both carry a 100-night trial and a 10-year warranty. SweetNight labels its trial a 100-night trial with free U.S. shipping, and Purple adds a lowest price guarantee alongside its trial and warranty. Neither trial term separates the two on paper.

Which mattress should side sleepers choose?

SweetNight lists side sleepers who need pressure-point contouring as the best fit for the CoolNest’s all-foam feel, and the 5-zone support design with nine comfort bars is built for full-body pressure relief. Purple says the mattress is designed to ease pressure at the hips, shoulders and joints and suits side sleepers among stomach, back and combination sleepers. Both name side sleeping directly, so the choice comes down to foam contouring versus a grid surface.

Does the Purple Mattress need a special bed frame?

Purple notes that not all bed frames provide proper structural support for a Purple mattress and points shoppers to check whether their current frame works. The mattress itself ships rolled with handles from a U.S. warehouse and needs no wait time before use. Confirm your frame before ordering either mattress.

Reviewed by the World Sleep Almanac editorial team. Updated 2026.