10 Best Sleeping Bag Liners 2025 in the United States

The Tough Outdoors Sleeping Bag Liner is made from 100% cotton, which makes it soft and breathable—a great choice if you want a comfortable sleep liner for camping, travel, or hotel stays. It's lightweight and portable, weighing just about 0.1 pounds, so it won’t add much bulk to your backpack. The size is generous, fitting adults up to 6’6” with an 85 x 37-inch rectangular shape, offering plenty of room to move around during sleep. The full-length zipper makes it easy to get in and out, and also lets you use it as a cover or a travel sheet, adding versatility. Its temperature rating is marked as ‘comfort’ and suitable for all seasons, meaning it’s good for mild to moderate weather but might not keep you warm in very cold conditions.

The Frelaxy Ultralight Sleeping Bag Liner is a great choice for travelers and campers looking for a lightweight and compact sleep option. Made from polyester, it feels soft and breathable, mimicking cotton but with less weight, which is ideal when you want to pack light. Weighing only about 196 grams and folding down small, it won’t take up much space in your backpack or luggage. Its size (84.6 by 37.4 inches) fits most adults comfortably and even includes a handy pillow sleeve for extra coziness. The liner is designed for summer use with a temperature rating between 16 and 30 degrees Celsius, so it’s best suited for warmer nights but won’t provide enough warmth in cold conditions.

The Friendly Swede Sleeping Bag Liner is made of microfiber, providing a cotton-soft feel while being breathable. This liner is designed to add up to 10°F of warmth to your sleeping bag, making it suitable for cold weather. It is generously sized at 41 inches in width and 86 inches in length, including a pillow pocket, which should be ample space for most adults. Weighing in at 500 grams or 17.6 ounces, it is relatively lightweight but may not be the best choice for those seeking ultralight packing options.