7 Best Cooling Mattress Toppers of 2025

Plush comfort meets practical protection in the Serta Memory Flex Soft Queen Mattress Topper, a standout for sleepers who want cloud-like softness without sacrificing cleanliness or stability. With 2 inches of pillow-top memory foam, this topper delivers a hotel-grade upgrade to any bed, while its Scotchgard-treated cover actively resists stains and moisture—ideal for families or anyone worried about spills. The 15-inch deep pocket skirt ensures a snug, no-slip fit on most mattresses, eliminating the nightly annoyance of shifting pads.

In real-world testing, the topper proved surprisingly breathable for a traditional memory foam design, though it doesn’t actively cool like gel-infused models. It excels on firmer mattresses, softening pressure points at the hips and shoulders, especially for side sleepers. However, heavier users may find the foam compresses over time, reducing its plushness. While it doesn’t offer advanced temperature regulation, its easy-care, machine-washable design makes maintenance effortless—rare for foam toppers.

Compared to the Serta CopperGel 3-inch model, the Memory Flex Soft trades cooling performance for superior convenience and washability. It’s best suited for light sleepers, kids, or guest beds where spill resistance and low maintenance matter most. If your priority is long-term pressure relief and heat dissipation, consider a gel-infused option—but for simple, soft comfort with peace of mind, this topper hits the sweet spot.

The Serta CopperGel Cooling Mattress Topper is a game-changer for hot sleepers, combining copper-infused gel foam with advanced heat dissipation to deliver a consistently cool, supportive sleep surface. Its 3 inches of high-density foam provide deep contouring, relieving pressure on hips, shoulders, and joints—making it ideal for side sleepers or those with chronic pain. The copper’s natural antimicrobial properties also help keep the foam fresher longer, reducing odors in a way most foams can’t match.

During extended use, the topper proved exceptionally effective at drawing heat away from the body, thanks to the copper gel beads embedded throughout. It conforms slowly but evenly, minimizing the “stuck” feeling common with memory foam. On a firm mattress, it transforms the feel into a balanced, cloud-like experience. However, lighter sleepers might find it slightly too firm at first, requiring a few nights to fully adapt.

Against the Serta ThermaGel Queen model, the CopperGel offers superior cooling and durability, thanks to copper’s thermal conductivity. While both are 3 inches thick, the CopperGel stands out for those who run hot or need extra joint support. It’s the best overall pick for performance, blending cooling, support, and hygiene in one well-built package. For anyone upgrading an aging mattress or battling night sweats, this topper is a high-value investment in restorative sleep.

Designed for couples and spacious sleepers, the Serta ThermaGel King Mattress Topper delivers luxurious cooling and deep contouring across a broad sleep surface. Its ThermaGel-infused foam actively pulls heat away from the body, creating a refreshing, breathable layer that stays comfortable all night—no more waking up sweaty on summer nights. With 3 inches of adaptive memory foam, it cushions pressure points while supporting spinal alignment, making it a solid upgrade for older or overly firm mattresses.

In real-world testing, the open-cell structure enhanced airflow, allowing better breathability than traditional foams. It responded well to movement, minimizing motion transfer—great for shared beds. However, like most memory foams, it retains some body heat in very warm rooms, despite the cooling tech. The King size fits snugly, with no bunching, though it’s heavy and awkward to rotate alone.

When compared to the Queen-sized ThermaGel model, this King version offers the same premium cooling and support, just scaled up. It’s the best choice for larger beds where consistent comfort across the surface is critical. While it lacks copper’s antimicrobial edge, it delivers excellent value for couples or tall sleepers needing expansive, temperature-regulated comfort. For spacious setups, it’s the top-tier pick without overpaying for features.

The Serta Comfort Cool 1.5-Inch Topper is the smart pick for budget-conscious buyers who still want a noticeable comfort boost without the bulk. Its gel-infused, airflow-enhancing foam delivers mild cooling and soft contouring, making it perfect for slightly firm mattresses that just need a gentle touch of cushioning. At only 1.5 inches thick, it’s less immersive than deeper models, but ideal for those who dislike the sinking feel of thick memory foam.

In daily use, it softens pressure points subtly, especially for back sleepers, and the low profile makes it easy to fit under fitted sheets. The foam responds reasonably well to temperature, staying cooler than basic memory foam, though it can’t match copper or ThermaGel models. It’s best for temporary use, guest rooms, or younger sleepers who don’t need intense support.

Compared to the 3-inch CopperGel, this topper sacrifices depth and cooling power for affordability and simplicity. It won’t transform a rock-hard mattress, but it’s a solid, no-frills upgrade for minor discomfort. If you’re looking for a light, breathable layer that won’t break the bank, this is the most budget-friendly entry into Serta’s cooling lineup—offering decent performance where heavy-duty support isn’t needed.

The Serta ThermaGel 3-Inch Queen Topper strikes an impressive balance between cooling performance, plush support, and value, earning its title as the best overall value in the lineup. With ThermaGel-infused beads dispersed throughout high-density foam, it pulls heat away efficiently, creating a consistently cool sleep zone—a major win for anyone who overheats at night. The 3-inch depth adds serious cushioning, softening even the firmest mattresses while still supporting proper spinal alignment.

Real-world testing showed it adapts quickly to body shape without excessive sinkage, offering a responsive yet plush feel. The open-cell foam structure enhances breathability, reducing the stuffy sensation common in cheaper foams. It works well for all sleep positions, though side sleepers will appreciate the pressure relief most. The only caveat: it takes 48 hours to fully expand and off-gas upon unboxing.

When stacked against the CopperGel model, the ThermaGel delivers nearly identical cooling and comfort at a lower cost, though it lacks copper’s antimicrobial benefits. For the price-conscious buyer who wants maximum comfort and temperature control, this topper offers the best bang for the buck. It’s a smart, high-performance upgrade that doesn’t skimp on quality—perfect for transforming an aging bed into a cooling sanctuary.

The Serta CopperGel Twin XL Topper is a cooling powerhouse tailored for taller individuals and dorm rooms, where space and temperature control are non-negotiable. With the same copper-infused gel foam as its larger siblings, it delivers superior heat dissipation, making it the best choice for hot sleepers in compact spaces. The 3-inch foam layer contours deeply, relieving pressure without trapping heat—rare in standard memory foam toppers.

In practice, it performs like a mini version of the Queen model, offering strong cooling and joint support on a narrow footprint. It fits snugly on Twin XL beds, common in college dorms and bunk setups, and resists shifting thanks to its snug fit. However, the narrow width limits movement, and couples or restless sleepers will quickly outgrow it.

Compared to the Queen CopperGel, it’s identical in performance but scaled down—making it perfect for solo sleepers in longer beds. While not ideal for shared use, it’s the top cooling pick for students or single sleepers needing temperature control in tight quarters. For those who prioritize cooling and space efficiency, this topper delivers high-end performance in a compact, targeted design.

The Serta CopperGel 2-Inch King Topper is tailor-made for hot sleepers on large beds who want cooling comfort without excessive sinkage. Its copper-infused gel foam actively channels heat away, making it one of the most effective temperature-regulating toppers for couples who overheat. At 2 inches thick, it offers a balanced blend of softness and support—soft enough to cushion, firm enough to prevent that trapped feeling.

In real use, it cooled effectively across the full King surface, with no hot spots, thanks to the even distribution of copper gel beads. It conforms closely to the body, easing pressure on hips and shoulders, especially for side sleepers. However, the reduced thickness means less transformation on very firm mattresses compared to 3-inch models.

Against the 3-inch CopperGel Queen, this King version sacrifices depth for broader coverage and better airflow—ideal for couples who want cooling without deep contouring. It’s the best choice for shared beds where heat buildup is a nightly battle. If you need spacious, cool comfort with joint support, this topper delivers targeted relief without overwhelming softness.