Typical price · as of July 2026
$60-$95
Key spec
3-inch ThermaGel-infused cooling memory foam topper; Twin XL (the standard dorm bed size); pressure-relieving; made in the USA; well-reviewed value…
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Serta ThermaGel Cooling Memory Foam Mattress Topper (3 Inch, Twin XL)
By the BlackBox gear desk · Updated July 2026
A 3-inch ThermaGel memory foam topper in Twin XL, the exact dorm-bed size. Cooling gel and pressure relief make a thin campus mattress far more comfortable.
How we picked this
Chosen from manufacturer specs and public research — no paid placement, and no hands-on testing we didn’t do, so there are no invented reviews or numbers here. Specs and prices vary by model and change over time, so confirm your exact one on the Amazon listing.
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Serta ThermaGel Cooling Memory Foam Mattress Topper (3 Inch, Twin XL) · $60-$95