The NEMO Sonic -20° Expedition Sleeping Bag is engineered for serious adventurers who need reliable warmth in extreme conditions. Featuring innovative Thermo-Gills™, this sleeping bag allows you to adjust the temperature range for personalized comfort, making it a must-have in your backpacking gear.
Constructed with 800-fill down, this mummy sleeping bag is perfect for winter camping and is designed to retain heat even in the harshest conditions. The Chevron baffle design prevents down migration, ensuring consistent insulation throughout the bag.
Additional features include a redesigned profile with enhanced draft collars and tubes, ensuring a thermally efficient seal. The shell and liner are made from fully recycled materials and are bluesign® approved, highlighting our commitment to sustainability. Whether you’re looking to buy a cold weather sleeping bag online or prepare for your next big-mountain adventure, the NEMO Sonic -20° is the best sleeping bag for -20 degrees.
Derrick Romero (verified owner) –
Absolutely love my NEMO Sonic -20°! It’s incredibly warm and comfortable, perfect for my winter backpacking trips.
Amy Reeves (verified owner) –
The Thermo-Gills are a game changer! I can adjust the temperature without feeling restricted. Highly recommend this sleeping bag.
Debbie Smith (verified owner) –
I was hesitant to buy a cold weather sleeping bag online, but the NEMO Sonic -20° exceeded my expectations. Great quality and warmth!