Choosing the best memory foam travel pillow for side sleepers can be a game-changer for your comfort on the go. Among the top contenders, the Purple Harmony Pillow stands out for its superior comfort and support. Featuring a unique Honeycombed GelFlex layer and a Talalay latex core, this pillow ensures you get a restful sleep even when you're away from home. However, its bulkiness makes it less travel-friendly, which is something to consider if portability is a priority. Priced at $179.00, it offers excellent durability and temperature regulation, but you might want to keep it at home due to its size.

For those who prioritize customizable comfort, the Nest Bedding Easy Breather Pillow is a fantastic choice. This pillow allows you to adjust the shredded memory foam fill to your liking, making it a versatile option for side sleepers. It scores high in both comfort and support, ensuring you wake up without any neck pain. Although it’s not the most portable option due to its bulk, its breathable materials and washable cover make it easy to maintain. At $119.00, it offers a great balance of features and affordability.

If you're looking for a pillow that combines cooling technology with adjustability, the Coop Home Goods Eden Pillow is worth considering. This pillow features a gel-infused memory foam that keeps you cool throughout the night, along with a gusseted design for enhanced support. It’s lightweight but somewhat bulky, making it a decent option for travel. With a price tag of $96.00, it offers high-quality materials and a machine-washable cover, making it a durable and easy-to-clean choice.

For those who need a compact and ergonomic option for travel, the Tempur-Pedic TEMPUR-Neck Pillow is ideal. This pillow is designed specifically for travel, featuring TEMPUR material that provides firm, consistent support. Its compact size makes it easier to carry, although it’s slightly bulky. Priced at $63.99, it offers excellent durability and a washable cover, making it a practical choice for frequent travelers.

Finally, the Sleep Number ComfortFit Pillow offers customizable support with its memory foam and down alternative fill. This pillow is suitable for all sleep positions, particularly side sleepers, thanks to its adjustable foam inserts. While it’s not the most travel-friendly due to its bulk, it scores high in comfort and durability. At $139.99, it also features a machine-washable cover, making it easy to keep clean.

In summary, the best memory foam travel pillow for side sleepers depends on your specific needs, whether it's superior support, customizable comfort, cooling features, or portability. Each of these pillows brings something unique to the table, ensuring you can find the perfect match for your travel and sleep needs.