84% Off Sleepy’s by Sealy Mattresses + Free Shipping at Mattress Firm
Updated March 27, 2026
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If you’ve been putting off upgrading your mattress, now’s the perfect time to make the switch. Mattress Firm is running a limited-time flash sale that’s too good to snooze on — up to 84% off Sleepy’s by Sealy Slumber Firm Mattresses, plus free shipping right to your door.
This popular Sealy line combines plush comfort with firm support, helping you wake up refreshed instead of stiff and sore. Whether you need a new mattress for your master bedroom, guest room, or a dorm setup, this sale has every size marked down to jaw-dropping prices.
Here’s the Breakdown:
- King: $280.49 (Reg. $1,699.99)
- Queen: $247.49 (Reg. $1,499.99)
- Full: $212.99 (Reg. $1,289.99)
- Twin XL: $189.74 (Reg. $1,149.99)
- Twin: $179.99 (Reg. $1,089.99)
Just use promo code FLASH25 at checkout to snag these savings before the sale disappears.
Why This Deal Is a Dream Come True:
- Trusted Sealy quality for long-lasting comfort
- Firm support designed for better posture and deeper sleep
- Huge 84% discount on all sizes
- Free shipping with no minimum purchase
Mattresses rarely drop this low — and when they do, they don’t stay in stock for long. Don’t miss your chance to upgrade your sleep setup for less than the price of a fancy comforter.
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