ViscoSoft Climate-Active Cooling Copper Topper review

ViscoSoft built this topper around heat, and it shows in the spec sheet. The top 2 inches are copper-infused memory foam, which ViscoSoft says draws heat away from pressure points, and they sit on 2 inches of high-density memory foam for support, for 4 inches in total. Ventilated channels run through the core to move warm air out, and the cover uses phase-changing yarns that the company says react to the temperature of the room for a cool-to-the-touch feel. That cover zips off and goes in the washing machine. ViscoSoft backs the topper with a 90-day money back guarantee and a 5-year warranty, and delivery is free. A twin XL was $224.99 on sale when we checked, down from $299.95. The trade-off is depth: 4 inches of memory foam softens a bed a lot, so sleepers who want only a thin cooling layer may prefer a 2- or 3-inch option.

Who it is for

Hot sleepers who want the most cooling features in one thick, pressure-relieving topper.

Price

From $224.99 for a twin XL on sale when checked (regular $299.95).

$299.95 $224.99 size: twin xl
Quoted from the vendor pricing page on November 10, 2026.

Key features

• 4-inch build: 2 inches of copper-infused memory foam over 2 inches of high-density memory foam
• Ventilated airflow channels that ViscoSoft says move heat out of the core
• Cover with phase-changing yarns that ViscoSoft says adapt to room temperature
• Removable, machine-washable cover that arrives fitted to the foam
• 90-day money back guarantee and a 5-year warranty

Strengths and weaknesses

• Strength: Stacks three separate cooling measures: copper foam, ventilation and a phase-change cover
• Strength: Thickest topper here, so it changes the feel of a firm bed the most
• Strength: Washable cover makes cleaning simple
• Weakness: 4 inches of memory foam can feel too deep for sleepers who like a firm surface
• Weakness: Sale pricing changes often, so the regular $299.95 twin XL price is the safer budget figure
• Weakness: Heavier and bulkier to move than 2-inch toppers

Key facts

• Price: $224.99 sale, $299.95 regular (twin XL)
• Thickness: 4 in
• Cooling: Copper foam, air channels, phase-change cover
• Trial and warranty: 90 days, 5 years

Where it ranks

ViscoSoft Climate-Active Cooling Copper Topper is No. 1 in our Best Cooling Mattress Toppers verdict.