REI Outlet

Sleeping Bags

NEMO Sonic -20


Shop Price $
CampSaver 659.95 Go →

Introducing the NEMO Sonic -20, the ultimate sleeping bag for cold weather adventures. Designed to provide the perfect balance of warmth, comfort, and versatility, this high-performance sleeping bag is a must-have for outdoor enthusiasts and adventurers who love to explore even in freezing temperatures.

One of the standout features of the NEMO Sonic -20 is its exceptional insulation. It features premium 800-fill power down, which offers an impressive warmth-to-weight ratio, keeping you cozy and comfortable throughout chilly nights. This insulation is treated with Nikwax hydrophobic down, ensuring that the down stays dry and maintains maximum loft, even in damp conditions. Whether you are camping in the snow or braving the winter cold, the Sonic -20 is built to keep you warm.

Another great feature of this sleeping bag is its innovative design. The NEMO Sonic -20 features Thermo Gills, which are zippered vents that allow you to easily regulate body temperature. With a simple zip, you can let out excess heat without having to completely unzip the bag, keeping you comfortable without compromising warmth. This unique design feature is ideal for those nights when the temperature fluctuates or when you find yourself getting too warm inside your sleeping bag.

Additionally, the NEMO Sonic -20 is built for maximum comfort. It features an ergonomic spoon-shaped design that provides extra room in the knee and elbow areas, allowing you to move and sleep in a more natural position. This design also eliminates unnecessary dead space, ensuring that your body heat is efficiently retained, further enhancing the bag’s insulating properties. The Sonic -20 is available in both regular and long sizes, accommodating users of different heights and providing a comfortable fit for everyone.

Durability is another key aspect of the NEMO Sonic -20. The outer shell is made from robust nylon ripstop fabric, which is not only resistant to tears and abrasions but also offers water-resistant properties to keep you dry in damp conditions. Moreover, the bag features a full-length snag-free zipper with a draft tube to prevent heat loss and a cinchable hood to seal in warmth, allowing you to completely immerse yourself in a cocoon of comfort.

Finally, the NEMO Sonic -20 is designed with convenience in mind. It comes with a compression stuff sack, which allows for easy and compact packing, making it practical for backpacking or any adventure where space is limited. The sleeping bag also features an internal stash pocket, allowing you to keep small essentials, such as your phone or headlamp, close at hand throughout the night.

In summary, the NEMO Sonic -20 is a feature-packed sleeping bag that ensures optimal warmth, comfort, and convenience in frigid weather conditions. Its premium insulation, innovative design, and durable construction make it the perfect companion for any cold-weather adventure, whether it’s mountaineering, winter camping, or simply enjoying a winter night under the stars. Don’t let freezing temperatures limit your outdoor experiences – with the NEMO Sonic -20, you can stay cozy and enjoy the beauty of winter like never before.

Read more about NEMO Sonic -20 at Find the specs, the best price, and compare it to other similar products.


Weight 3 lbs 14 oz
Product Brand Nemo
Nemo Sleeping Bags

Added: September 19, 2023

* Prices are updated daily from the best online outdoor stores. Please check sites for the latest best price.


NEMO Sonic -20

NEMO Sonic -20

There are no reviews of NEMO Sonic -20.