10 Best Ultralight Sleeping Bags 2025 in the United States

The MalloMe Sleeping Bag is designed for 3-season use, suitable for temperatures from 50°F to 77°F, making it a good choice for spring through fall camping in mild to moderate weather. Weighing about 3 pounds, it is light enough for backpacking, and it compresses well for easy carrying. The bag features synthetic insulation, which performs reliably in damp conditions and dries faster than down, but it may be bulkier and less warm than some high-end alternatives.

Its rectangular shape offers generous room to move, enhancing comfort, especially for those who dislike feeling confined, though this shape can be less efficient at retaining heat compared to mummy-style bags. The outer shell is a waterproof polyester with a unique hex-tech design, protecting against moisture and light rain, which is handy in unpredictable weather. The bag fits adults up to 6 feet tall and is spacious enough for kids, making it versatile for families.

User-friendly details like double-sided zippers, adjustable drawstrings around the head area, and easy machine washing add to its practicality. While it is not ideal for very cold conditions below 50°F or ultralight backpackers seeking the lightest gear possible, this sleeping bag offers a well-balanced combination of comfort, durability, and ease of use. It suits casual campers and families looking for reliable, comfortable sleep during moderate outdoor adventures.

The Big Agnes Torchlight EXP is a well-designed ultralight sleeping bag aimed at backpackers needing warmth and versatility in cold weather. It weighs just under 4 pounds, which is quite light for a 0-degree rated bag, making it suitable for serious cold weather camping without adding too much bulk to your pack. The 650-fill DownTek insulation is premium down treated to resist moisture, so it keeps you warm even in damp conditions better than untreated down. Its mummy shape helps retain heat efficiently, and the jacket-style hood, insulated zipper, and 3D draft collar add extra warmth around critical areas. One standout feature is the expandable side panels, allowing you to customize the fit—either snug for warmth or looser for comfort—something not many bags offer.

The shell is made of durable, recycled polyester ripstop that balances toughness with light weight. When packed, the bag compresses down to a manageable size, fitting easily in most backpacks. The Padlok system to attach the bag to a sleeping pad and the Pillow Barn for securing a pillow are thoughtful touches for a steady, comfortable night's sleep. On the downside, although it is light, it’s not the absolute lightest in its category, and the price might be on the higher side due to its advanced features. Also, it’s designed primarily for solo users and colder conditions, so if you camp in milder weather or need a wider bag, this might feel restrictive. The water-repellent shell helps but don’t expect full waterproofing.

This bag suits individuals who prioritize warmth, adaptability, and lightweight performance on cold-weather backpacking trips.

The Sea to Summit Spark Ultralight Down Sleeping Bag is a solid choice for backpackers and outdoor enthusiasts who want a lightweight yet warm option for 2-season adventures. Weighing just under 2 pounds, it’s easy to carry on long hikes or bike trips without adding much bulk. With a 15°F (-9°C) temperature rating, it’s designed to keep you comfortable during chilly nights in spring, fall, or mild winter conditions. The high-quality 850+ fill power down insulation is treated to resist moisture, helping the sleeping bag maintain its warmth even if it gets a bit damp.

Its ultralight 10D nylon shell is water-resistant and breathable, so you’re less likely to feel clammy inside. The mummy shape provides a snug fit that keeps heat in but still allows some room to move naturally. YKK zippers ensure smooth opening and closing without snagging. One thing to consider is that the very thin shell material, while great for saving weight, might require extra care to avoid tears. Also, the 15-degree rating means it’s not ideal for very cold winter camping.

For those focused on minimizing pack weight while staying warm in moderate cold, this sleeping bag is a dependable option backed by a lifetime warranty. Its compact packed size makes it easy to stash in your pack, and the responsible down sourcing adds an ethical touch for environmentally conscious users.