10 Best King Mattress Toppers 2025 in the United States

This king-size mattress topper from Niagara Sleep Solution is made with bamboo viscose and polyester, offering a soft and breathable surface that’s gentle on sensitive skin. At about 8 inches thick, it provides a noticeable cushioning layer that can help ease back pain and improve comfort on firmer or older mattresses. The topper is described as soft rather than firm, so it’s best suited for those wanting extra plushness rather than a supportive, firm feel.

Its bamboo-derived fabric is naturally cooling and sweat-absorbent, making it a good option for hot sleepers. It’s free from harsh chemicals like latex or formaldehyde, which may appeal to allergy-sensitive users. The deep pocket and stretchy sides fit mattresses from 8 to 20 inches thick, adding versatility for various mattress depths. One downside is that it’s not water-resistant and requires hand washing, which could be less convenient for everyday cleaning.

This topper is ideal for those seeking a soft, cooling, and eco-friendly layer to brighten up an older mattress and enjoy a cloud-like feel, especially if they sleep hot or need gentle back support.

The BEDLORE King Mattress Topper offers a soft and breathable sleeping surface made of 40% bamboo viscose and 60% polyester. This combination aids moisture-wicking and temperature regulation, making it suitable for those who tend to sleep hot or have sensitive skin. Its thickness accommodates mattresses up to 18 inches deep, with deep elastic pockets that keep it securely in place without shifting during the night.

The pillow-top style delivers a plush, cushioning feel that is ideal for gentle support, which can benefit individuals experiencing back pain. It is machine washable for easy maintenance and hygiene, though it is not water resistant, so spills should be cleaned promptly. While it enhances comfort and breathability, it is best suited for those looking for softness rather than firmer, orthopedic support.

This mattress topper is designed for adults seeking to add softness and coolness to a king-sized mattress, providing a secure fit and convenient care features.

The Tempur-Pedic TEMPUR-Adapt + Cooling 3-Inch King Mattress Topper is designed for those seeking enhanced comfort and cooling for their sleep surface. One of the standout features is the 3 inches of TEMPUR-ES material that conforms to your body, providing excellent support and comfort while accommodating various sleep positions. The cooling cover is another plus, keeping you comfortable through the night, and its breathable fabric allows for good airflow, helping to regulate temperature. The washable cover makes maintenance easy, ensuring you can keep it clean and fresh without hassle.

This mattress topper fits perfectly on king-size mattresses, making it a good choice for anyone upgrading their sleep experience at home or seeking extra comfort for guests. It’s also versatile enough for use in different settings, like dorms or RVs, which adds to its appeal.

Some users may find it too soft if they prefer a firmer sleeping surface, as it is classified as medium firmness. Additionally, while it is relatively easy to handle, its weight of 30.5 pounds might make it somewhat cumbersome for some individuals to move or adjust. The Tempur-Pedic TEMPUR-Adapt + Cooling mattress topper is an excellent choice for those who prioritize comfort and cooling features, especially if you are a side sleeper or enjoy a softer feel. However, if you prefer a firmer mattress or have concerns about weight, you might want to explore other options as well.