10 Best Side Sleeper Pillows 2026 in the United States

The Coop Home Goods Original Adjustable Pillow is a strong choice for side sleepers due to its highly customizable loft and firmness. You can add or remove the shredded memory foam and microfiber fill to create a pillow height and firmness that suits your comfort and sleeping position, which is especially helpful for side sleepers who often need firmer support to keep their neck aligned. Its rectangular shape and queen size provide ample surface area. The pillow’s mix of cross-cut memory foam and microfiber offers a good balance between softness and support, adapting well to your head and neck.

The fabric cover is made from a breathable blend of polyester and rayon, promoting airflow and helping keep the pillow cool through the night—an important feature since memory foam can sometimes retain heat. Plus, the pillow is machine washable (cover and inner pillow separately), which makes maintenance easier. Some users might find adjusting the fill a bit fiddly at first, and memory foam can feel firmer in cooler rooms, requiring occasional adjustments.

Although the pillow works for back and stomach sleepers too, its adjustability and medium firmness make it particularly suited for side sleepers looking for personalized comfort and support. It’s also certified safe and free of harmful chemicals, adding peace of mind. This pillow is ideal if you want flexibility in firmness and loft combined with breathable materials for a cooler night's sleep.

The Purple Harmony Pillow is a tall, plush pillow designed to provide gentle support without pressure, making it a good option for side sleepers who prefer a softer feel. With a loft of about 7.5 inches, it helps keep your head and neck aligned while you sleep on your side. The pillow features a unique combination of a breathable GelFlex honeycomb layer and a Talalay latex core, which work together to offer support while staying cool through the night. This airflow and moisture-wicking cover make it especially comfortable if you tend to get warm when sleeping.

The rectangular shape and plush firmness suit those who want cushioning but still need proper neck support. However, the pillow is not adjustable, so you can’t add or remove fill to customize the height or firmness. While it maintains its shape well over time thanks to durable materials, side sleepers who need firmer support or more personalized loft might find it less ideal.

On the plus side, it’s hypoallergenic and easy to clean with a machine-washable cover, which is great for sensitive sleepers. Taking all factors into consideration, the Purple Harmony Pillow is well-suited for side sleepers wanting a cool, plush, and durable option but may not work if you need a firmer or adjustable pillow.

The Coop Home Goods Original Cut-Out Adjustable Pillow is designed specifically for side sleepers, featuring a unique shoulder cut-out to help keep your neck and head aligned for better comfort throughout the night. One of its biggest advantages is the adjustable fill, allowing you to easily add or remove memory foam to find the perfect height and firmness that suits you, which is great since side sleepers often need extra loft to fill the space between their shoulder and head. The pillow uses freshly made cross-cut memory foam combined with microfiber, offering a supportive yet soft feel that adapts well to your movements.

Its breathable Lulltra fabric cover helps keep things cool, and since it’s machine washable, maintenance is simple. Some users might notice a mild smell at first, common with new memory foam, but this fades after airing out. Also, the pillow arrives compressed, so it needs some fluffing and possibly a dryer session to reach full loft, which can be a little extra effort. The firmness leans toward medium, but thanks to the adjustable fill, you can customize it from softer to firmer based on your preference.

Certified to be free from harmful chemicals, this pillow is a safe choice for regular use. If you’re a side sleeper looking for a pillow that offers personalized support, cooling properties, and easy care, this pillow could be a strong fit. For those who prefer a very firm or very high loft pillow straight out of the box, it may require some initial adjustments to reach the desired comfort level.