10 Best Sleeping Bag Liners 2025 in the United States

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.

The Frelaxy Ultralight Sleeping Bag Liner is a lightweight and compact option made from breathable polyester, offering a soft and comfortable feel similar to cotton but at half the weight. Weighing around 196 grams for the smallest size, it’s easy to pack and carry, making it great for backpackers and travelers who want to save space and reduce load. Its size (27.5in by 84.6in) fits most adults comfortably, and availability in three sizes adds flexibility for different body types or preferences.

This liner is ideal for mild to warm conditions or as an extra layer inside a sleeping bag to enhance hygiene and comfort. The material dries quickly and is machine washable, simplifying maintenance after outdoor use or travel. The integrated pillow sleeve adds convenience and comfort during sleep. While it does not include a zipper, which some may prefer for securing the liner inside a sleeping bag, its polyester construction provides durability though it may feel less naturally breathable than cotton in humid climates.

This liner serves as an excellent choice for travelers and campers seeking a lightweight, easy-to-care-for liner that improves cleanliness and comfort without adding bulk.

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.