10 Best Sleeping Bag Liners 2025 in the United States

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.

For those needing a balance between comfort and portability, it is a good fit. The liner is machine-washable, adding to its ease of care, which is a significant plus for camping trips where staying clean can be challenging. The full-length zipper allows for easy entry and exit, and the durable construction means it can withstand the rigors of outdoor use. It also plays a crucial role in keeping your sleeping bag clean by acting as a barrier against sweat and bacteria.

One drawback might be that while it’s great for adding warmth, it may be less effective in extremely hot conditions compared to liners made specifically for cooling. The lifetime warranty offered by The Friendly Swede adds a layer of assurance for long-term use, making it an appealing option for regular campers.

The Friendly Swede Sleeping Bag Liner Ultralight offers many features that make it an appealing choice for campers and travelers. Made from polyester with a silk-like texture, it feels soft against the skin while effectively wicking away sweat and moisture during warmer seasons. Its lightweight design, weighing only 9.17 ounces (260 grams), makes it very portable and backpacking-friendly. The liner is generously sized at 41 inches by 86 inches, providing plenty of room to stretch and move.

The full-length zipper is a handy feature, making it easy to get in and out of the liner, and the double zipper design ensures smooth operation and durability. Additionally, this liner is machine washable, adding to its ease of care and practicality for regular use. A significant benefit is its ability to keep your sleeping bag and bedding clean, which can extend the life of your camping gear by protecting it from sweat, bacteria, and other contaminants.

This liner is most suitable for use in summer and spring, as its thin material might not provide adequate warmth in colder conditions. For those prioritizing comfort, portability, and hygiene during warmer months, this sleeping bag liner is a strong contender. The product also comes with a lifetime warranty, suggesting confidence in its durability and quality. On the downside, the thin material might not be ideal for colder weather, and some users might prefer natural fabrics over polyester.

The Tough Outdoors Sleeping Bag Liner is made from 100% polyester, which is soft, lightweight, and breathable, making it comfortable for travel and camping. Its polyester material is durable and easy to care for, as it can be easily washed to maintain hygiene during trips. The liner is designed to keep your sleeping bag clean and add a layer of comfort, which is particularly beneficial in maintaining a fresh sleeping environment.

With a generous size of 37 inches in width and 85 inches in length (with a double size available at 74 inches in length), it accommodates users up to 6’6” tall, ensuring ample room to stretch out and sleep comfortably. The inclusion of a zipper makes it easy to get in and out of, which is a practical feature for both camping and hotel stays. The integrated pillow sleeve allows for added comfort by providing a dedicated space for your pillow or a makeshift pillow using a jacket or clothing items.

The liner is lightweight and portable, with a package weight of just 0.4 kilograms, making it easy to carry on your travels. However, its temperature rating is more suited for summer or warmer conditions, as it doesn’t provide significant insulation for cold weather. For those looking for an easy-to-care-for, comfortable, and spacious sleeping bag liner, this product would be a good fit, particularly for summer camping or improving sleep hygiene in hotels and other accommodations.