10 Best Ultralight Sleeping Bags 2025 in the United States

The QEZER Down Sleeping Bag is an ultralight mummy-style sleeping bag designed for adults. It stands out due to its impressive warmth retention, thanks to the 620 Fill Power down filling and additional cotton insulation at the chest area. This ensures comfort in temperatures ranging from 18°F to 32°F, with a limit down to 10°F, making it suitable for cold weather camping.

Weighing just 3.73 lbs and packing down to a compact size of 14.6 x 7.9 inches, it is easily portable and ideal for backpacking and hiking trips. The mummy shape offers a snug fit but also includes a trapezoidal bottom for extra foot space, enhancing comfort during sleep. Constructed from 400T 40D tear-resistant nylon fabric, it is both durable and resistant to water and wind, which is beneficial in harsh outdoor conditions.

Additional features include an inner pocket for small items and the option to zip two sleeping bags together for couples. However, some users might find the tight mummy fit restrictive, and the need to ventilate the sleeping bag for several hours after unpacking could be a minor inconvenience.

The QEZER Down Sleeping Bag is designed for adult backpackers looking for lightweight and compact gear suitable for cold weather. Filled with 600+ fill power natural duck down, it offers good warmth with a comfort temperature range from 28°F to 45°F, and can handle temperatures as low as 18°F. This makes it a solid choice for three-season camping and mild winter conditions. It weighs just over 3 pounds and compresses down to a manageable size (about 14" x 7.5"), so it's easy to carry in a backpack without adding much bulk.

The mummy shape helps retain heat, and the roomy trapezoidal foot box means you won't feel cramped. Made with durable 400T20D nylon, the shell is tear-resistant and water-repellent, helping protect the down insulation and prolong the bag's life. One drawback is the initial strong compression—it's recommended to air it out for several hours after unpacking to regain fluffiness and insulation power. Also, while it performs well in cold conditions, those expecting to camp in freezing or below 18°F weather might find it less suitable.

The bag includes double zippers that allow you to connect two sleeping bags, which is handy for couples or family trips. Given its price, weight, and temperature rating, this sleeping bag fits well for backpackers and campers who prioritize warmth and lightness but want a practical and durable option for a range of outdoor adventures.

The NEMO Equipment Disco Endless Promise Down Sleeping Bag is designed for backpackers who need a lightweight and comfortable option for cold-weather camping, with a temperature rating between -1°C and 4°C (around 30°F to 39°F), making it suitable for winter use in moderately cold conditions. It uses premium 650 fill power down insulation, which is lightweight and offers excellent warmth-to-weight ratio. The down is hydrophobic (resistant to moisture) and certified to high animal welfare standards, which is a plus for eco-conscious users.

The sleeping bag’s unique Spoon shape provides extra room around elbows and knees, improving comfort during sleep without adding bulk. It features smart ventilation through updated Thermo Gill vents that allow you to adjust airflow, helping regulate temperature when needed. The oversized draft collar helps keep cold air out and warmth in, enhancing comfort. The outer shell is made from durable polyester, which balances weather resistance and packability.

Weighing about 1.45 kilograms (around 3.2 pounds), it’s not the absolute lightest in the ultralight category but remains manageable for most backpackers focused on warmth and comfort. While the packed size (15 x 13 x 13 inches) is somewhat larger than some ultralight models, the bag’s design emphasizes recyclability and sustainability, using materials intended to avoid landfill waste. This sleeping bag is a strong option for winter backpackers seeking a responsible, cozy, and moderately lightweight choice with thoughtful features, though those seeking the lightest weight or extreme cold protection might want to consider other models.