10 Best Down Sleeping Bags 2026 in the United States

The Western Mountaineering Ultralite 20 Degree Sleeping Bag is designed for summer camping and mountaineering, with a comfort rating around 20°F. It’s filled with 16 ounces of high-quality 850+ fill power goose down, which means it’s very warm for its weight and packs down small. The mummy shape helps trap heat efficiently, making it a good choice if you want to stay warm without extra bulk. Weighing just under 2 pounds, it’s lightweight enough for backpackers who prioritize carrying less. The shell fabric is a breathable yet weather-resistant 20-denier material, helping keep you dry and comfortable without adding much weight.

A full-length #5 YKK zipper with an insulated draft tube and a full down collar helps minimize heat loss, which is great for colder nights near the bag’s limit. The continuous baffle design lets you adjust the insulation to your comfort, adding a nice level of customization. On the downside, the bag is best suited for temperatures not much lower than 20°F, so it might not be ideal for colder conditions or people who run cold at night. Its 6-foot length fits most adults but might be tight if you're taller. The packed size is fairly compact but not the smallest available, so if ultra-minimal pack size is your priority, there could be lighter options. While the shell is weather resistant, it isn’t fully waterproof, so a rain cover or tent is advisable in wet conditions.

This sleeping bag is a solid pick for serious campers who want a lightweight, highly compressible option for summer mountaineering and backpacking, offering excellent warmth-to-weight with premium down insulation and thoughtful design features.

The Kelty Cosmic 20 Down Mummy Sleeping Bag is a reliable choice for backpackers and campers, offering a temperature rating of 20 degrees, making it suitable for 3-season use. The 550 fill power down provides decent warmth and is highly compressible, which is beneficial for packing light. With a weight of 2.6 pounds for the regular size, it strikes a balance between warmth and portability.

The mummy shape is designed to keep heat in, though some might find it restrictive compared to traditional rectangular bags. The shell material is made from recycled nylon and polyester taffeta, which is an eco-friendly touch, and it has a PFAS-free durable water repellent finish to protect against moisture. The packed size of 13 x 7 inches makes it compact and easy to carry.

Dual direction zippers add convenience, allowing for easy entry and ventilation adjustments. However, the 550 fill power may not be as warm as higher fill power options, and it could be less effective in extreme cold conditions. Additionally, while the recycled materials are a positive environmental step, they may not offer the same durability as non-recycled options. Ideal for eco-conscious campers or backpackers who prioritize sustainability and comfort during moderate weather conditions.

The NEMO Equipment Disco Endless Promise Sleeping Bag is designed for backpackers and campers who want reliable warmth and comfort in winter conditions. It has a temperature rating suitable for mild cold, from 3°C to 15°C (about 37°F to 59°F), making it a good choice for three-season use in cooler weather. The 650 fill power down is hydrophobic and responsibly sourced, which means it offers good insulation while being more resistant to moisture and ethically produced. Weighing around 1.24 kg (2.7 lbs), it’s relatively lightweight for a winter bag but not ultra-light, so it balances warmth with portability. The classic spoon-shaped design adds extra room at elbows and knees, providing more freedom of movement than a traditional mummy bag.

The recycled polyester ripstop shell with Durable Water Repellent (DWR) treatment adds durability and some water resistance, important for outdoor use. Unique features like the Thermo Gill vents let you adjust ventilation with a multi-stage zipper system, helping to manage temperature without fully opening the bag. The Blanket Fold oversized draft collar is a smart addition to block cold air or release heat as needed, enhancing comfort. The zipper closure is straightforward and includes thoughtful venting controls.

A key aspect is the company's commitment to sustainability, designing the bag for full recyclability and backing it with a lifetime warranty. This sleeping bag suits those who want a well-rounded, comfortable, and environmentally conscious option for winter camping, especially if you appreciate adjustable warmth and a bit more spaciousness in your sleeping bag shape. For those needing a sleeping bag for extreme cold or ultra-lightweight backpacking, other specialized options might be more appropriate.