by Best Mattress by Retailer — Find the Right Store for Your Situation
Where you buy a mattress changes what you pay, what trial you get, and whether the warranty holds. For the best combination of selection, price, and protection, buying direct online wins. Costco and IKEA suit buyers who want simplicity and low stakes. NYC showrooms serve shoppers who need to test before committing. Our top pick across all channels is the Amerisleep AS3: sold direct, 100-night trial, 20-year warranty, and real firmness zoning for back and side sleepers.
Amerisleep AS3
9.1/10
All-foam Bio-Pur
Medium 5/10
100-night trial
20-yr warranty
- HIVE 5-zone support system firms directly under the lumbar
- Plant-based Bio-Pur foam relieves pressure and sleeps cooler than standard memory foam
- CertiPUR-US certified, manufactured in the USA
- 20-year split warranty: full replacement years 1–10
- Softer edges than a coil hybrid
- Sleepers over 230 lb may prefer the firmer AS5 Hybrid
Whether you shop at Costco, Amazon, or a local NYC store, the AS3 represents the value ceiling for most buyers — medium-firm, zoned, and backed by one of the strongest trials on the market.
How to Choose: Retailer vs. Direct vs. Local
Every mattress purchase involves a tradeoff between price, selection, return rights, and the ability to test in person. Retailer rules differ in ways that affect you after the sale:
- Return windows: Costco gives 90 days. Amazon varies by seller. Direct brands typically offer 100 nights or longer.
- Warranty coverage: Buying through an unauthorized third-party seller (common on Amazon) can void the manufacturer warranty entirely. Buying direct or through an authorized retailer keeps it intact.
- Price: Costco and warehouse stores frequently beat retail MSRP on commodity models. Online-direct brands run promotional discounts (often 20–30% off) that can undercut even warehouse pricing.
- Selection: Local stores and IKEA carry limited SKUs. Amazon and direct brands carry full lineups.
The retailer guide below maps each channel to the buyer who benefits most from it, with direct links to our tested recommendations for each.
Mattress Guides by Retailer
Costco
Costco mattresses are a strong option for members who want a no-negotiation price, easy warehouse returns (90-day), and no-pressure shopping. The tradeoff: limited model variety and a shorter return window than most direct brands. Two separate guides cover the Costco mattress market:
Best Costco Mattress
Our primary Costco buying guide: the top-rated foam, hybrid, and latex options available in-club and online, with a direct comparison of Costco pricing vs. direct-brand promotions.
Best Mattresses at Costco (2026)
Updated for the current year’s Costco floor inventory: which models are worth buying, which to skip, and how each one compares to its direct-purchase equivalent.
IKEA
IKEA mattresses target budget-conscious buyers and renters who need something functional, easy to return, and sized for a European frame. The 365-day return window is legitimately one of the best in retail. The ceiling for performance is lower than direct brands, but for a first apartment or guest room, IKEA is hard to beat:
Best IKEA Mattress
The full IKEA mattress lineup ranked: which foam, spring, and latex models perform at their price, which ones to avoid, and how IKEA sizing compares to standard US sizes.
Amazon
Amazon carries thousands of mattress listings, but only a fraction are from legitimate brands with intact manufacturer warranties. The upside: competitive pricing, fast Prime shipping, and easy side-by-side review browsing. The risk: unauthorized third-party sellers that void warranties. Our guide separates the real picks from the noise:
Best Mattresses on Amazon (2026)
The mattresses on Amazon that are actually worth buying: authorized listings, verified warranties, and honest ratings sorted by sleep position, firmness, and price tier.
Walmart
Walmart’s mattress selection sits between IKEA and Amazon — accessible price points, in-store pickup, and a wide range of boxed-foam options. Best for buyers who want a quick, low-friction purchase and are comfortable with shorter trial windows:
Best Mattresses at Walmart (2026)
Which Walmart mattresses punch above their price, which brands hold up after a year, and how Walmart’s return policy compares to what direct-to-consumer brands offer.
Local Showrooms (NYC)
Testing a mattress in person remains the most reliable way to confirm firmness preference. New York City has a dense concentration of independent mattress stores that carry brands not available in national chains. For buyers in the metro area, the in-store experience is worth the trip before spending $1,000 or more:
Best Mattress Store NYC
The best independently tested mattress stores in New York City by neighborhood, with notes on which brands each carries, price ranges, and whether floor staff know their products.
Retailer Comparison at a Glance
Before committing to any channel, compare the key terms that affect your purchase beyond the sticker price:
| Retailer | Return Window | Warranty Risk | Best for |
|---|---|---|---|
| Amerisleep Direct | 100 nights | None (direct) | Best overall value + warranty |
| Costco | 90 days | Limited (Costco terms) | Members, no-hassle return |
| IKEA | 365 days | None (IKEA terms) | Budget, rental, first apartment |
| Amazon | Varies by seller | High if unauthorized seller | Price comparison, Prime shipping |
| Walmart | 90 days (varies) | Brand-dependent | Quick pickup, budget options |
| NYC Local Stores | Store policy | None (authorized) | In-person testing before buying |
What Retailers Don’t Tell You
Three points the store staff rarely volunteer:
- Promotional pricing at the manufacturer beats almost every retailer. Direct brands like Amerisleep run 20–30% off promotions that are active most of the year. Check the brand’s site before paying retail MSRP anywhere else. The AS3 queen from Amerisleep direct is consistently lower than the equivalent Costco floor price once the promotion is active.
- The trial period starts at delivery, not purchase. At Amazon, delivery delays can eat into your trial window. Buying direct means the clock starts when your mattress actually arrives, not when you clicked "buy."
- Return policies at warehouse and big-box stores do not equal brand trials. Costco's 90-day window sounds generous until you compare it to Amerisleep's 100-night trial or IKEA's 365-day return. If you need time to adjust, the brand trial is almost always better structured.
For a deeper look at how the Amerisleep AS3 performs when bought through specific channels, see our Amerisleep mattress hub and the dedicated AS3 review.
Our Pick by Retailer
If you’ve decided on your shopping channel, here is a single-line verdict for each:
- Costco: Best value pick is the Sealy Posturepedic foam or the AS3-equivalent Amerisleep model. Full guide: best Costco mattress and best Costco mattresses 2026.
- IKEA: The Hasvag spring mattress or the Hesstun foam for buyers who want a firmer feel. Full guide: best IKEA mattress.
- Amazon: Buy only from authorized sellers. The Tuft & Needle Original and the Zinus 12-inch Green Tea are the two most consistently reliable Amazon-native picks. Full guide: best mattresses on Amazon 2026.
- Walmart: Linenspa, Zinus, and Lucid are the value leaders at Walmart. Full guide: best mattresses at Walmart 2026.
- NYC local: Brooklyn Bedding and Sleepy’s (Mattress Firm) locations are reliable floor-test options. Full guide: best mattress store NYC.
- Direct online: The Amerisleep AS3 on a 100-night trial at amerisleep.com.
Buying direct from a reputable brand gives you the strongest trial, the cleanest warranty, and the best pricing during promotions. If you have a Costco membership and want simplicity, the 90-day return covers most people’s decision window. Local NYC stores make sense only if you need to test firmness in person before committing. For every situation, the mattress quality ceiling is set by the product — not the retailer — and our top pick across all channels is the Amerisleep AS3.