Costco’s 2026 Memorial Day mattress floor is set. Headline deals: Casper Cooling Select queen $449.99 (item 1748800, $150 off), Casper Cooling Select king $639.99 (item 1748801), Sealy Posturepedic Pro Highland Manor 13″ queen $599.99 (item 1900478), Beautyrest BR800 medium full $379.99 (item 1608576), and the Novaform ComfortGrande Plus 14″ queen at $499.99. Pallets are per-warehouse — once a SKU sells, it’s gone for the season.
Costco Memorial Day 2026: The Mattress Deal at a Glance
Costco doesn’t run a flashy “Memorial Day mattress event” the way Mattress Firm or Tempur-Pedic does — the sticker on the pallet is the deal. We walked a San Diego warehouse on May 20, 2026 and photographed every mattress on the floor. Below is the full lineup, with item numbers so you can confirm pricing at your local Costco.
Floor display and pricing wall, San Diego Costco — May 20, 2026.
Casper Cooling Select Memory Foam Mattress
Casper Cooling Select 12″ Memory Foam
Costco item #1748800 (Queen) · #1748801 (King) SAVE $150
$449.99 Queen · $639.99 King
This is the strongest premium-brand mattress deal we found this Memorial Day. The Cooling Select is Casper’s Costco-exclusive 12-inch all-foam build: a cooling knit cover, breathable comfort foam, Zoned Support for hips and shoulders, and a durable poly base. Four-layer construction — closer to Casper.com’s Original than to a typical $450 boxed mattress.
- 12″ profile, medium feel
- Cooling knit cover + premium breathable top foam
- Zoned Support for spinal alignment
- Ships boxed for $0 delivery; in-store-only at this price
- Reg $599.99 Queen / $799.99 King — $150–$160 off through Memorial Day weekend
Best for: back and side sleepers who run warm and want a name-brand foam mattress without paying Casper.com retail (Casper Original Queen is $1,295 direct).
Sealy Posturepedic Pro Highland Manor 13″ Mattress
Sealy Posturepedic Pro Highland Manor 13″ Hybrid
Costco item #1900478 (Queen Mattress Only) · +Recycling fee $18
$599.99 Queen
The Posturepedic Pro Highland Manor is Sealy’s innerspring hybrid at Costco — DuraFlex coil edge system, PrecisionFit individually wrapped coils, and a Cool To Touch knit cover over comfort foam. Medium feel. This is a real mattress-store-grade build at a warehouse price.
- 13″ profile, medium feel hybrid
- PrecisionFit pocketed coils + DuraFlex foam edge encasement
- Cool To Touch performance knit cover
- Pairs with the Sealy Posturepedic 9″ StableSupport queen foundation (item 1900442) at $109.99 — sold as foundation only
- Comparable Sealy Posturepedic Plus hybrids at mattress stores: $1,099–$1,499 queen
Best for: combination sleepers and couples who want pushback and edge support — closer in feel to a traditional pillowtop than a foam-only mattress.
Beautyrest BR800 12″ Medium Mattress
Beautyrest BR800 12″ Medium Pocketed Coil
Costco items: #1608575 Twin · #1608576 Full · matching Full foundation #1608578
$269.99 Twin · $379.99 Full
The Beautyrest BR800 is the value workhorse of Costco’s mattress aisle: 800-series individually pocketed coils, GelTouch comfort foam, DualCool Fiber Cover, and AirCool foam encasement. Medium feel, 12-inch profile, 10-year limited warranty. This is the SKU to grab for a guest bedroom, a teenager’s first real mattress, or a starter setup.
- 12″ profile, medium feel
- 800-series pocketed coil unit + AirCool foam encasement
- DualCool fiber cover + GelTouch foam quilt layer
- Matching Full foundation (item 1608578) at $109.99 — sold separately
- +$18 California recycling fee per mattress
Best for: guest rooms, kids’ rooms, RVs, and rentals — a real coil mattress under $400 is increasingly rare.
Novaform Memory Foam (Costco’s House-Brand Foam Line)
Novaform Dreamaway 8″ Gel Memory Foam
Costco item #1698562 (Twin) · #1698564 (Full)
$149.99 Twin · $199.99 Full
Boxed 8-inch gel memory foam. The cheapest “real” mattress at Costco — fine for bunk beds, guest rooms, and short-term setups. Read our full Novaform review for how it compares to the thicker Novaform lines.
Novaform ComfortGrande Plus 14″ Gel Memory Foam
Costco item #1796260 (Queen) · #1796261 (King)
$499.99 Queen · $699.99 King
Costco’s flagship Novaform: 14 inches of layered gel memory foam under a quilted cooling cover. Medium feel. The queen at $499.99 is the price-per-inch leader in Costco’s mattress aisle this Memorial Day — and at $200 less than the Casper Cooling Select queen if you only need a basic foam build.
Foundations & Boxsprings Under $110
If you’re buying a Costco mattress and need a base, do not buy it from your mattress retailer — Costco has two strong picks at the same price:
- Sealy Posturepedic 9″ StableSupport Queen Foundation — Costco item #1900442 — $109.99
- Beautyrest BR800 Full Foundation — Costco item #1608578 — $109.99
Both work with any non-adjustable platform or metal bed frame. Both are sold foundation-only — the mattress is a separate SKU.
Bonus: Bedding & Sheet Deals We Spotted
While you’re in the warehouse for a mattress, these are the bedding SKUs worth grabbing in the same trip. Pricing was verified May 12, 2026.
- Kirkland Signature 680TC Queen 6-Piece Sheet Set — item #1306090 — $79.99
- Hotel Signature Sateen Egyptian Cotton Queen Sheets (6-pc) — item #1726198 — $49.99
- Hotel Signature Sateen Egyptian Cotton King Sheets (6-pc) — item #1726199 — $59.99
- Purely Organic Turkish Organic Cotton Sheets — item #1796241 — $29.97 Queen / $39.97 King
- South Point Microfiber 4-Piece Sheet Set — item #1019729 — $10.99 Twin XL / Full
- Below Zero Cooling Queen Comforter (Down Alt) — item #1796333 — $36.99
Want to Lie on It First? Visit Yawnder’s San Diego Showroom
Costco’s mattress pricing is excellent, but you can’t actually sleep on a Casper Cooling Select or a Sealy Posturepedic Pro at the warehouse — and unboxing a $500 mattress only to find out it doesn’t fit your body is a costly mistake.
If you’re in Southern California, swing through Yawnder San Diego at 1441 Encinitas Blvd, Encinitas CA 92024 first. We carry a curated lineup of premium pillowtop and hybrid mattresses across the same firmness range as Costco’s floor (medium foam, medium hybrid, plush pillowtop) so you can test the feel category before committing to a boxed mattress you’ll have to ship back.
If a Costco mattress is the right call, we’ll tell you. If you’d be better in a true pressure-relieving hybrid for $200 more, we’ll show you which one — and price-match honest competitor pricing in writing.
How to Lock In the Memorial Day Price
- Confirm item number at your warehouse. Costco pricing is per-warehouse — the SKUs above were live in San Diego on May 20, 2026. Call ahead with the item number to verify stock.
- In-warehouse beats Costco.com. Online pricing on the same SKU is usually $20–$60 higher to cover shipping (Casper Cooling Select Queen is $479.99 on Costco.com versus $449.99 on the warehouse floor).
- Buy the foundation in the same trip. The $109.99 Sealy and Beautyrest foundations sell out fastest — there’s typically a 3-to-1 mattress-to-foundation pallet ratio on the floor.
- Don’t forget the +$18 California mattress recycling fee. It’s added at checkout on every queen/king/full mattress sold in CA.
- Use Costco’s 100% satisfaction guarantee. If the mattress doesn’t work out, you can return it — unlike the 100-night-trial-with-restocking-fee model most boxed mattress brands use.
Costco Memorial Day Mattress FAQ
When is Costco’s 2026 Memorial Day mattress sale?
Costco’s in-warehouse mattress pricing on the SKUs above is already live (verified May 20, 2026) and typically holds through Memorial Day weekend (May 23–26, 2026). Costco doesn’t post a separate “sale price” — the sticker is the deal.
Is the Casper Cooling Select at Costco the same as Casper.com?
No — it’s a Costco-exclusive build. The Cooling Select is a 4-layer foam mattress closer in construction to the Casper Original than the higher-end Wave or Snow. It uses Casper’s Zoned Support and cooling knit cover, but the price ($449.99 queen) is roughly 35% of what the equivalent Casper.com mattress costs.
What’s the difference between Sealy Posturepedic Pro Highland Manor and a mattress-store Sealy Posturepedic Plus?
Highland Manor is a Costco-exclusive Posturepedic Pro build with PrecisionFit pocketed coils and DuraFlex foam edge encasement. Feel and warranty are very close to the Sealy Posturepedic Plus hybrids at mattress retailers — typically $400–$900 less at Costco.
Does Costco offer mattress delivery and old-mattress removal?
Boxed mattresses (Casper, Novaform) ship free to the door. Larger mattresses like the Sealy Posturepedic Pro Highland Manor and Beautyrest BR800 require shipping fees and typically don’t include haul-away. If you need white-glove delivery and mattress recycling included, Yawnder San Diego offers both on every mattress over $799.
Can I return a Costco mattress if it’s not the right fit?
Yes — Costco’s 100% satisfaction guarantee applies to mattresses. You can return any of the SKUs above to any Costco warehouse for a full refund, even after sleeping on it. This is the most generous return policy of any major mattress retailer.
Should I buy a Costco mattress or a premium mattress?
If you’re outfitting a guest room, a kid’s room, an RV, or a short-term rental, Costco wins on value — full stop. If this is your primary bed and you sleep on it 8+ hours a night, the $400–$800 step-up to a premium pillowtop hybrid usually pays back in sleep quality and 10-year durability. Test the feel category at a showroom first.