TypeHybrid; a zoned support system of innerspring coils and foam.
FirmnessMedium or Firm
Height14 inches
TrialRefer to Costco's return policy for trial period details
Warranty20-year limited warranty
The 30-second verdict
Yes for back and stomach sleepers: NapLab marks both firmness options suitable for those positions. The catch is that side sleepers fit Medium, not Firm. At 14 inches tall, this hybrid combines foam with spring coils and thicker coils through the middle. Costco lists 4.3 out of 5 stars from 1,157 reviews for the King Firm option, a favorable owner rating that does not settle whether its firmness suits you. Buy it only if the sleep-position fit matches your needs.
Best forBack and stomach sleepers
Not ideal forSide sleepers choosing Firm
Legacy Premier Support 14″ Hybrid Mattress
Owner rating4.3 / 51,157 reviews on costco.com
Firmness options2Medium, Firm
Sizes2Queen to King
Pros
Low motion transfer. NapLab rated motion transfer low on Medium; its 7.66 m/s² total acceleration range may limit partner movement.
Strong edge support. NapLab rated sitting edge support excellent and lying edge support good; sitting is the stronger edge use.
Fiberglass-free foam. Novaform says the mattress contains zero fiberglass, which matters if you avoid that material.
Cons
Heat-test caution. NapLab recorded a maximum temperature of 89.7°F, so hot sleepers should weigh it against the brand's cooler-sleep claims.
Regular rotation. Novaform says to rotate the mattress regularly, so add it to your upkeep routine.
Adjustment time. It may take a few nights to feel familiar, so give it more than one night before deciding.
How firm is the Legacy Premier Support 14″ Hybrid Mattress, and which firmness should you pick?
Choose Medium if you want a medium-firm feel; Firm is also offered, but NapLab’s reading is for Medium only. NapLab rated the Medium version 6 out of 10, medium-firm, and said it felt a touch firmer than expected. That gives you a feel guide for Medium, not a score for Firm. If medium-firm is the feel you prefer, Medium is the option this reading supports. If you are considering Firm, do not treat the Medium result as a preview of its feel.
SofterFirmer
Medium
Firm
Firmness options: softest to firmest, as Novaform lists them.Sources (1)
Is the Legacy Premier Support 14″ Hybrid Mattress right for your sleep position and body weight?
Yes, this mattress can fit back and stomach sleepers in either version. Medium is the better choice for side sleepers and combination sleepers whose rotation includes their side.
NapLab’s fit table gives these ratings in both weight bands:
Weight band
Version
Side
Back
Stomach
Under 150 lbs.
Medium
Yes
Yes
Yes
Under 150 lbs.
Firm
No
Yes
Yes
150 to 250 lbs.
Medium
Yes
Yes
Yes
150 to 250 lbs.
Firm
No
Yes
Yes
The same fit guidance applies in both bands, so the weight band does not change which version fits your position. NapLab rates sitting edge support excellent and lying edge support good. Sitting at the edge has the stronger rating.
Edges
Edge support, outside tester
NapLab: excellent sitting edge support and good lying edge support.
Neck: lying on your side, ask if your pillow and the bed keep your head in line with your spine.
Shoulders: ask if the shoulder under you settles in, or if you feel a pinch after a few minutes.
Back: lying face up, slide a hand under your waist and ask if your lower back feels supported or left hanging.
Hips: ask if your hips dip lower than your shoulders, like lying in a shallow bowl.
Four checks: lie still for a few minutes in the position you sleep in most, then notice how each spot feels. These are comfort checks, not a medical test.Sources (1)
Is the Legacy Premier Support 14″ Hybrid Mattress good for back pain?
It is not a sure pick for back pain. Novaform says the Legacy Premier uses a zoned back-lift system made from innerspring coils and foam. NapLab’s reviewer said they felt supported in all sleeping positions, but that report does not promise pain relief.
The Medium version has a cautionary back-pain report, not a reason to choose it. A couple who bought it said their pain increased after about a week and was unbearable after a month. One r/Costco owner also reported that the top foam compressed, the mattress became rock hard, and they had back pain.
What the brand says
Novaform lists a zoned back-lift system made from innerspring coils and foam.
Scroll sideways to see the whole table
Tester
What it says about back pain
NapLab
NapLab's reviewer said they felt well supported in all sleeping positions on the Legacy Premier.
r/Costco on Reddit
One owner said the top foam compressed and the mattress became rock hard, causing them massive back pain.
r/Mattress on Reddit
A couple who bought the Medium version said their back pain increased after about a week and was unbearable after a month.
Ongoing back pain? Ask a doctor or physical therapist what support your back needs before you buy.
The listed design aims for cooler sleep, but NapLab's result is a temperature, not a warm-or-neutral verdict. Costco lists a plush cool-touch cover and enhanced airflow, plus foam and innerspring coils in the back-lift system. These are the stated cooling-related features, not proof of cooler sleep. NapLab recorded a maximum temperature of 89.7°F, which gives a temperature reading rather than a plain sleep-feel verdict.
Cooling features the brand lists
Plush cool-touch cover and enhanced airflow are marketed for cooler sleep
the back-lift system uses innerspring coils and foam
Some partner movement may reach you, but the motion reading is low. NapLab tested the Medium version and rated motion transfer low, measuring 7.66 m/s² total acceleration range. That suggests a light sleeper may notice less movement from a restless partner. NapLab also rated bounce moderate, measuring 8.75″ total bounce height, so the bed still has some spring when a partner moves. Expect reduced motion, not a guarantee that you will sleep through every shift.
Scroll sideways to see the whole table
Tester
Motion and bounce reading
NapLab
Medium version: motion transfer low, 7.66 m/s² total acceleration range; bounce moderate, 8.75″ total bounce height.
Choose based on the room and frame you have. Measure your available space, then compare it with the dimensions below. Use the table to choose Queen or King without relying on size names alone. Check your frame’s size requirements before ordering, so you can confirm the selected size works for your setup.
Novaform says its cover is made of fabric featuring ultra cool-touch fibers, with over an inch of foam and fiber woven together with that fabric. CertiPUR-US® covers flexible polyurethane foam products, not the cover or entire mattress. The company completed product evaluation, analysis, testing, and program requirements for this certification.
Cover
Fabric featuring ultra cool-touch fibers, woven with over an inch of foam and fiber
Does the Legacy Premier Support 14″ Hybrid Mattress have fiberglass?
No. Novaform says the Legacy Premier Support 14" Hybrid Mattress contains zero fiberglass. To check the law tag on your own mattress, find the tag attached to it and read the wording printed there. Use Novaform’s statement for the fiberglass question, and check the tag directly rather than relying on an assumption about its contents.
Use a standard box spring with proper airflow and support. The brand lists it as compatible and says it can void the limited warranty if it lacks proper airflow and support. The brand also labels platform beds, slatted bases, and adjustable bases compatible, but says all three will void the limited warranty. It says platform and adjustable bases will not provide proper airflow and support. Slats must be spaced less than six inches apart, but that does not change the warranty warning.
Scroll sideways to see the whole table
Base
What the brand says
Rules and warranty
Platform bed
is compatible with platform beds
Needs proper airflow and support. A base without proper airflow and support voids the limited warranty.
Slatted base
is compatible with slats spaced less than six inches apart
Slats spaced less than six inches apart. A base without proper airflow and support voids the limited warranty.
Box spring
is compatible with box springs
Standard box spring with proper airflow and support. A base without proper airflow and support voids the limited warranty.
Adjustable base
is compatible with adjustable bases
Needs proper airflow and support. A base without proper airflow and support voids the limited warranty.
How long will it last, and does it need flipping or rotating?
RTINGS.com gives this mattress a longevity score of 6.6, a durability rating rather than a lifespan in years. Novaform says to rotate it regularly. The feel may take a few nights to get used to, so give yourself that time before deciding whether its comfort works for you. Use the rating for durability context and comfort for fit when choosing this bed.
The brand gives this mattress a delivery wait window of 5 - 7 business days, so plan for the full range rather than one arrival day. Keep your calendar open across that span before making plans that depend on delivery, such as arranging when to clear space for the bed.
Novaform lists a 20-year limited warranty for this mattress. Before buying, review the warranty terms and decide whether its protection fits your needs. Keep the terms with your purchase records so you can check your coverage or refer to them if you need to make a claim.
Owner feedback is mixed, and Costco's King Firm listing shows 4.3 out of 5 stars from 1,157 reviews. That score gives you a snapshot of the listing's buyers, but it cannot predict your comfort.
A recent Reddit owner said the 14-inch Firm King felt pretty great, which is one person's fit report rather than a guarantee. Another recent Reddit owner described the Firm version as hard. If you prefer a softer feel, weigh that complaint before buying; the rating cannot tell you whether this firmness will suit you.
4.3 / 5
costco.com rating
1,157 reviews on costco.com.
What owners like
Firm support: A recent owner of the 14-inch Firm King said it felt pretty great.
What owners complain about
Too firm: A recent owner described the firm version as hard.
How does the Legacy Premier Support 14″ Hybrid Mattress compare?
Choose among Novaform’s siblings by the feature you want; look outside the brand for a cooling or budget fit. Pick Platinum for a medium-feel hybrid with a 16.5-inch profile, or Legacy Elite Premier for a 16-inch, seven-layer hybrid with a Medium Firm feel. Choose ComfortGrande Advanced Hybrid for responsive coils and phase-change gel, or ComfortGrande Advanced if you want memory foam. Costco describes Serafina PerfectTemp 14 as Novaform’s most advanced cooling mattress, with dual phase-change material. Advanced Back Support Plus highlights precision-contoured foam for targeted back support. SoFresh Plus has a removable, machine-washable, moisture-wicking cover. DreamAway suits setups that need an 8-inch profile.
Saatva Classic suits hot sleepers who want coil bounce; Sleep Foundation rated its temperature control 10.0/10 and describes its dual-coil surface as responsive. Queen, 11.5-inch: $2,229. Allswell suits budget-focused buyers seeking a firm hybrid; Sleep Foundation scored its temperature control 7.0/10. Queen: $282.
Another Novaform model
Platinum 16.5" Luxury Hybrid Mattress
Pick it if: you prefer a medium-feel hybrid with a 16.5-inch profile; Costco lists both features.
Another Novaform model
Legacy Elite Premier 16" Hybrid Mattress
Pick it if: you want a 16-inch, seven-layer hybrid with a Medium Firm feel.
Another Novaform model
ComfortGrande 14" Advanced Hybrid Gel Memory Foam Mattress
Pick it if: you want responsive coils and phase-change gel for temperature regulation.
Another Novaform model
ComfortGrande Advanced 14" Gel Memory Foam Mattress
Pick it if: you specifically want memory foam; Costco lists its composition as Memory Foam.
Another Novaform model
Serafina PerfectTemp 14" Gel Memory Foam Mattress
Why pick it: For cooling-focused shoppers, Costco describes Serafina as Novaform's most advanced cooling mattress with dual phase-change material.
Another Novaform model
Advanced Back Support Plus 12" Responsive Foam Mattress
Pick it if: targeted back support is your priority; its page highlights precision-contoured foam.
Another Novaform model
SoFresh Plus 10" Responsive Foam Mattress
Pick it if: a removable, machine-washable, moisture-wicking cover is important to you.
Another Novaform model
Dreamaway 8" Gel Memory Foam Mattress
Pick it if: an 8-inch mattress profile better suits your setup; Costco lists its thickness as 8 inches.
Another brand
Saatva Classic (Saatva)$2,229 Queen
Why pick it: Hot sleepers who want coil bounce may prefer the Classic; Sleep Foundation rated temperature control 10.0/10 and describes its dual-coil surface as responsive.
Another brand
Allswell 10 in Hybrid Mattress in a Box with Gel Memory Foam (Allswell)$282 Queen
Why pick it: Budget-focused buyers seeking a firm hybrid may prefer Allswell; Sleep Foundation scored its temperature control 7.0/10 and calls its price approachable for budget shoppers.
Rival prices are Queen prices and they change, so check the store before you buy.
We read the maker's own pages, outside testers and owner reviews, and we date every fact. We do not test beds ourselves. Every source we used is listed below with the day we checked it.
Step 01Brand
What Novaform publishes
We read the product page, spec tabs and policy pages for layers, sizes, list prices, trial and warranty.
Step 02Testers
Outside test results
We credit each score to the tester that gave it and never blend scores into one number.
Step 03Owners
Owner reviews
Where a rating exists, we read the owner reviews behind it and outside summaries of what owners like and dislike.
We could not find enough good evidence to answer these questions yet, so this page leaves them out: Where to Try, Full Trial & Return Terms.