Serta 1.5" Comfort Cooling Memory Foam Mattress Topper review

Serta's Comfort Cool topper is a simple 1.5-inch layer of gel-infused memory foam. Serta says the foam is open cell to improve airflow and heat dissipation, and that it conforms to the body for side, back and stomach sleepers. It is rated plush, the full measures 53 by 74 inches, and it weighs 6.3 lb. The foam is CertiPUR-US certified. When we checked, Walmart.com sold the full for $32.99 and Twin XL for $55.79, but queen, king and twin were out of stock, so this is mainly an option for full-size beds right now. The listing says there is no written warranty, care is spot clean only, and with 60 ratings it has far less shopper feedback than the Mainstays toppers. It makes sense when you want a Serta label and a light change on a full bed.

Who it is for

Full-size bed owners who want a light, cheap refresh

Price

$32.99 for a full on Walmart.com when checked; queen out of stock.

Current price is USD $32.99
Quoted from the vendor pricing page on November 11, 2026.

Key features

• 1.5 inches of gel-infused memory foam
• Open cell foam for airflow
• Plush firmness
• Full measures 53 x 74 x 1.5 inches
• CertiPUR-US certified foam

Strengths and weaknesses

• Strength: Full size cost $32.99, sold by Walmart.com
• Strength: Open cell foam aimed at heat dissipation
• Strength: Light at 6.3 lb for a full
• Weakness: Queen, king and twin were out of stock when checked
• Weakness: Listing says there is no written warranty
• Weakness: Only 60 ratings on the listing

Key facts

• Full price: $32.99
• Thickness: 1.5 in
• Firmness: Plush
• Warranty: None stated

Where it ranks

Serta 1.5" Comfort Cooling Memory Foam Mattress Topper is No. 9 in our Best Walmart Mattress Toppers verdict.